The Rare Pokemon Virus You WANT To Catch! | The SCIENCE of... Pokemon (Pokerus)

SUBSCRIBE to Catch all the Theories! ►

We've talked about shiny Pokemon, one of the rarest finds in any Pokemon game. Today, Austin is going a step further in the rare department. Theorists, have any of you ever heard of the Pokemon virus known as the Pokerus? I'm going to guess even some of the most fanatic of Pokemon fans watching this have not. What is the Pokerus? What does it do? And why, Theorists, do you WANT to catch it? Austin, take it away!

Join The SCIENCE on Patreon ►
Want to join in the SCIENCE discussion? Head to ►►

Game Theories:
The Tragedy of Deltarune (Undertale) ►
How DEADLY Is Mario's Bob-Omb? ►►
What is a Kirby? The SCIENTIFIC PROOF! ►

How To SURVIVE A Nuclear Fallout! ►
MONIKA: Google's Newest Creation! ►►
Minecraft Diamonds DECODED! ►►
The Move That BROKE Pokemon! ►►


  1. ShadowPoni

    ShadowPoniPred dnevom

    I only (legitimately, without trading) got pokerus one time, back in... I think it was... Hm... it was either Crystal version, or possibly Leaf green. I'm leaning more toward Crystal, because I played it way more than Leaf. Edit: just remembered I had a sneasel I infected with it in Pearl. I'm really not sure what exactly happened, like if it was a glitch or if I did some weird specific thing that happened; but after I'd figured out how to evolve it (around lv.50 was when I found out about the razor claw).. the first time it leveled up after evolving, most of its stats went up by 15-20 each??? I don't know if it was because I evolved it so late, and the virus just caused the stats to jump to what they would have been if I evolved the sneasel at an earlier level? I know that pre-evolutions get less stat boosts than evolved forms; so that was the only reason I could think of that would cause it...

  2. Deepanshu Singhal

    Deepanshu SinghalPred 4 dnevi

    Then is it possible that just like computer viruses, real viruses are also created? By some extraterrestrial species who is altering every species' dna on different planet with their own dna and those whose physical immunity denies it fall sick.. Were we evolved by natural selection or someone manipulated our genes to evolve this way?

  3. Nikolai13

    Nikolai13Pred 5 dnevi

    *drops vial of T-Virus* "Oopsy-poopsy!"

  4. Carter TheUnimaginitive

    Carter TheUnimaginitivePred 7 dnevi

    Is is nearly three times more common in gen 8 to get pokerus

  5. Carter TheUnimaginitive

    Carter TheUnimaginitivePred 7 dnevi

    Me: Casually watches while infecting the rest of my Pokémon with pokerus

  6. The Blue Phoenix: Captain Gamer

    The Blue Phoenix: Captain GamerPred 8 dnevi

    I can't believe Tier Zoo and Austin are buddies.

  7. Azerty2978 azerty

    Azerty2978 azertyPred 9 dnevi

    If viruses are living bodies? Yes, I think so. I like to think that they appeared on Earth, but separately from the first cells... another evolution branch that used the other to survive... Maybe that's totally messed up (which could totally be). Edit : It is not really a serious theory just a random thought that came of mu mind that's not serious business

  8. Yann Oliveira

    Yann OliveiraPred 12 dnevi

    can we stop for a second and discuss about how a bacteriophage basically rapes a bacteria? the difference is that I personally think they deserve it

  9. Refurbished Condom Salesman

    Refurbished Condom SalesmanPred 13 dnevi

    When I was younger I remember my friend coming over to show me and my other buddy his pokemon had pokerus, I was very skeptical on it even existing because it sounded like b.s.and I've been playing since gen 1. Anyways I took a look at his pokemon and I was shocked so I asked him how did he get it and where he was at that time to see if I could get it but he insisted that it was just luck and location had nothing to do with it but I went over to the same place which was victory road (ruby version) and started battling random pokemon and ended up fighting a loudred after the battle I went to the nearest pokemon center and in my disbelief the nurse said my pokemon has it!!! I was so estatic what is the likely hood that 2 people in the same room getting pokerus within an hour of each other and mind you this was back in the gba days and me and my friends didn't have a link cable so there's no way I got it from him. I asked my third friend to go to the same area I was just to see if he got it but unfortunately he wasn't so lucky .even to this day I'm still skeptical on it being a luck thing.

  10. Ali Martinez Jurado

    Ali Martinez JuradoPred 13 dnevi

    3 of my pokemon caught the pokerus virus

  11. Jocelyn Klarer

    Jocelyn KlarerPred 14 dnevi

    Rewatching this episode after Covid-19, the pandemic, and 2020 hits on a whole other level….

  12. Very chill child

    Very chill childPred 16 dnevi

    My pokemon got it in the same day when I got to shinies in less then 3 minutes (today at the time I’m writing this)

  13. Steven Feagley

    Steven FeagleyPred 16 dnevi

    It may not produce like creatures like humans and animals but they are alive in their own right and way.

  14. Da-punisher556

    Da-punisher556Pred 16 dnevi

    My Pokémon got it I guess I’m lucky

  15. fr3domgod

    fr3domgodPred 17 dnevi

    Where's mp

  16. Brian Munro

    Brian MunroPred 17 dnevi

    4 ev = 1 stat point. Not a 1:1 ratio. Love you guys

  17. • Grio •

    • Grio •Pred 17 dnevi

    You caught a Eevee... Wait, it's shiny....Let's go to the Pokemon center... Wait it have Pokerus too!?

  18. MythicalCookies

    MythicalCookiesPred 17 dnevi

    All of my pokemon has pokerus......... Yet I've never seen a shiny pokemon....

  19. Safe

    SafePred 17 dnevi

    After like 2 years of not opening my DS lite in Summer of 2020 I got my pokemon in Platinum infected by a pokerus, only to find out that the wild pokemon that infected my pokemon was a chansey with a pokerus that I caught. It's nuts.

  20. Lucky Arceus

    Lucky ArceusPred 18 dnevi

    Are…are pokerus viruses also Pokémon themselves? If this does happen in the future, I’m calling poison/psychic type.

  21. Moadot720

    Moadot720Pred 19 dnevi

    0:50 He BETTER not have been in college while I’m not!!!!

  22. Emma Gill

    Emma GillPred 19 dnevi

    I had no idea Pokerus was so rare - I’ve had it randomly (especially in like gen 3 games) many times, way more often than I’ve ever found a shiny 🤔

  23. Izhar Ahmad

    Izhar AhmadPred 19 dnevi

    6:25 Lets all remember Uvogin for a second

  24. the meeper

    the meeperPred 20 dnevi

    5:13 I would've done speed

  25. Jose Jasso

    Jose JassoPred 20 dnevi

    I got it from when I was tradeing in ultra moon then after a while it infected all of my Pokémon

  26. Charlie C

    Charlie CPred 20 dnevi

    Ah yes Pokémon genocide

  27. David Fisher

    David FisherPred 20 dnevi

    Vitamins increase all the way to 252EVS in Sword and Shield.

  28. Maria Luisa Berard

    Maria Luisa BerardPred 21 dnevom

    Pokemon:did we done that?

  29. Val Broderick

    Val BroderickPred 21 dnevom

    Can I just point out that to what Austin was talking about whether or not viruses are "alive", many of the things there are not qualifyers. Several of these are just checking whether or not something is similar to other living things, not whether something is "alive" or not. We can get rid of the 1st, 4th, and 5th, at the very least.

  30. Amber Bansal

    Amber BansalPred 21 dnevom

    Did anyone notice folder named Pet stuff !

  31. Hazel O'Brien

    Hazel O'BrienPred 22 dnevi

    The millions of micro organisms going inside me Me: RAAAAAAAAAPPPEEE

  32. Becca Ryuu

    Becca RyuuPred 23 dnevi

    Does anyone know the song that starts playing around 6:28 after the Buneary is kil- uh I mean fainted....? :)

  33. Eva-Naiya Torian

    Eva-Naiya TorianPred 23 dnevi

    Hey Austin what are the chances that the pokemon flu can be transferred to electric type Pokemon and said trainers with electric type Pokemon?

  34. Den Sevostyanov

    Den SevostyanovPred 23 dnevi


  35. Thabang Nkopane

    Thabang NkopanePred 23 dnevi


  36. ale x

    ale xPred 24 dnevi

    pokerus more like pokecovid-19

  37. Static plays.

    Static plays.Pred 24 dnevi

    The original virus design looks human made change my mind.


    ALVIN ABRAHAMPred 24 dnevi

    me to virus: you saved me but why virus:monke

  39. the gaster master

    the gaster masterPred 25 dnevi

    Viruses are artificially made infection by future humans AKA aliens to kill, benifit, harm or evolve any organisum it infects

  40. the gaster master

    the gaster masterPred 25 dnevi

    That's what I think

  41. blood bag

    blood bagPred 25 dnevi

    this virus legit looks like a funking robot :∆

  42. Noodle Kat

    Noodle KatPred 25 dnevi


  43. alolanraichu

    alolanraichuPred 25 dnevi

    I only found pokerus once on pokemon,think it was in alpha sapphire when I first found it,I've heard about it years before so I know how extremely rare it is

  44. FdR NGM

    FdR NGMPred 26 dnevi

    Viruses are aliens.

  45. Redemption

    RedemptionPred 27 dnevi

    This isnt mattpat lol

  46. SammySuxs

    SammySuxsPred 28 dnevi

    me with my level 100 scorbunny or the 3rd evo of that starter w the virus😎

  47. ThunderWolf600

    ThunderWolf600Pred 28 dnevi

    As a pokemon nerd..... that isn't how EV's work lmao

  48. alolanraichu

    alolanraichuPred 25 dnevi

    it's too confusing for me to understand

  49. Gabriel Le Pen

    Gabriel Le PenPred 28 dnevi

    Smugon Competitors: Who's ready to ignore all the basic sanitary rules?

  50. Hikari Azuriel

    Hikari AzurielPred 28 dnevi

    Tier Zoo is legit one of the best ytb when it comes to biology!

  51. darktemplar446

    darktemplar446Pred 28 dnevi

    Your really confused by EV training...just saying. You got it pretty wrong here. =X

  52. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    Here's a theory: PokéRus was designed by SilphCo. prior to the events of GSC.

  53. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    14:08 _Jiggly Bu_

  54. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    So, PokéRus is artificial?

  55. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    Again with the Kanto Plurals. The singular and plural forms of a Pokémon's name are identical. Changing the spelling to pluralize the name was a localization error from the first few episodes of Season 1 of the anime. It was corrected in later episodes soon after it was discovered. If I've said it once, I've said it a million times: in terms of pluralization, the closest English word to a Pokémon's name would be _deer,_ as its singular and plural are identical under all circumstances. Here's an easy rule to remember when pluralizing the name of a Pokémon: _The plural of Pokémon name X is always X. No spelling changes, no pronunciation changes, no exceptions._

  56. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    It's not a coma, it's just briefly unconscious. It's assumed that either it recovers shortly after the battle or an area Pokémon Ranger heals it.

  57. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    Honestly, when people say they "killed" a wild Pokémon, it annoys me to no end. Pokémon are only killed in certain cutscenes of the dark story for _Pokémon Insurgence,_ a scene where the protagonist rips off the head of a Nuclear-Type (I wish I was kidding) in the fan-made _Pokémon Uranium_ fanfiction _Adventures in Tandor,_ and the incomplete and abandoned fanfiction _Game of Champions._

  58. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    The vitamins are liquid, not pills.

  59. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    I like to make my Pokémon blindingly fast. More specifically, with the Snivy line, I like to combine blistering Speed (taking advantage of its status as Unova's fastest starter) with mind-blowing Special Attack and go with moves like SolarBeam, Giga Drain, Energy Ball, and Leaf Storm, as well as getting it to hold a Miracle Seed to ramp things up even further.

  60. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    The name "Yamask" has the stress on the first syllable, not the second. Otherwise, the pronunciation was pretty good.

  61. AetheralMeowstic

    AetheralMeowsticPred 28 dnevi

    I personally don't support Sword/Shield. As far as I'm concerned, Gen VII was the last generation that GAME FREAK truly cared about the fans.

  62. planet maker 347

    planet maker 347Pred 28 dnevi

    ive got a good one, explain how much energy the slayers crucible outputs(its hotter than planck temperature and none of that heat is irradiated into the environment)in one second.

  63. its aaron

    its aaronPred 29 dnevi

    where is matpat

  64. James McGuire 3

    James McGuire 3Pred 29 dnevi

    I’m 11 and my weight is 170 ld

  65. Sal Exume

    Sal ExumePred 29 dnevi

    I like your vids more than mattpat

  66. Justin Woods

    Justin WoodsPred 29 dnevi

    I wish effort values actually worked like this, Austin usually you’re on point with you mechanics explanations, but this time you fell short my dude

  67. Nenad Vujakovic

    Nenad VujakovicPred 29 dnevi

    if we can measure its energy output and it has a purpose we could call it life but by that we can call all radiation life or even light(photons and atoms and all the bits in them)....and why not?

  68. Nenad Vujakovic

    Nenad VujakovicPred 29 dnevi

    i always thought that hyperbeam is plasma as i heats the surrounding air much more than fire and not laser....

  69. Nolan Stone

    Nolan StonePred mesecem

    EV training doesnt work the way they say it does. It is 4 EV = 1 stat. So 100 EV in attack would get you 25 attack.

  70. Tom Müller

    Tom MüllerPred mesecem

    A minor mistake, 4 ev-poinst equals 1 Status point not 1 equals 1

  71. FranklinsMad400

    FranklinsMad400Pred mesecem

    The Buneary scene😭😂

  72. InsaneInsomniac

    InsaneInsomniacPred mesecem

    well, odds are a hell of a thing...I've literally never knowingly encountered a shiny outside the story shinys (like red gyarados) but I've gotten pokerus on two different runs...technically speaking I may have encountered numerous shinys since original gen 1 is my most played (as a kid I only had pokemon yellow some mario rip off and the mario 6 golden coins one for gameboy, and I played pokemon the most) and I know you *can* get shinys in gen 1, but you wont actually know it unless you happen to catch them AND then later trade them to gen 2 where they'd have their shiny sprite actually look different, cause gen 1 graphics were way limited

  73. Tatsumi

    TatsumiPred mesecem

    I hate EV

  74. Ace567

    Ace567Pred mesecem

    All the Pokémon players screaming because it actually takes 4 EVs to raise a stat by one

  75. EpicCorpziaCat

    EpicCorpziaCatPred mesecem

    Let’s talk about the corona virus

  76. Jツ

    JツPred mesecem

    Everyone knows that viruses are actually the modern remanents of the ancient von neumann probes that seeded all life in the universe eons ago. Jeeze Austin do you live under a rock or something? 🤣

  77. Elana youtube addict

    Elana youtube addictPred mesecem

    I remember getting this on my piplup in pokemon pearl and freaked out in excitment. Never got a shiny in my life but got something better.

  78. BigCheesey 101

    BigCheesey 101Pred mesecem

    I wonder if there are tiny little cell sized Pokémon that would be sick

  79. Kapoh

    KapohPred mesecem

    no viruses are alien's trying to kill us all

  80. Samuel Brewer

    Samuel BrewerPred mesecem

    When he said nothing natural, I immediately said amphetamines... why do I think this way?

  81. MiraculousMongoose

    MiraculousMongoosePred mesecem

    Squirtle supreme

  82. meyoumeyou7789

    meyoumeyou7789Pred mesecem

    Wait wait wait, what is a pokerus and why have I never heard of this before?

  83. Ben Sunderland

    Ben SunderlandPred mesecem


  84. Teresa Sexton

    Teresa SextonPred mesecem

    U can get even better stats with a Serious Mint

  85. SalazarCardBreaks

    SalazarCardBreaksPred mesecem

    Wait is Matt Pat not doing game theory?

  86. Daison Richards

    Daison RichardsPred mesecem

    The chanel is game theorists so there are multiple of them and one is austin.

  87. Seb Tube

    Seb TubePred mesecem

    Pokemon 2: How To Pokemon Virus Works

  88. Saikou

    SaikouPred mesecem

    you didnt have to explain evs cuz i know how to train them just for me

  89. FidgetOrc

    FidgetOrcPred mesecem

    Viruses are not living. Like they are in PCs, they are just an injection of instructions into otherwise functioning systems.

  90. Naro

    NaroPred mesecem

    The chance of finding a shiny Pokémon was actually doubled in Gen VI. EV training is very much not as extreme as presented here. As at least one other has pointed out, it's not one-to-one; at level 100, a given stat gains one point for every _four_ EVs it has. A Pokémon can have up to 510 EVs _total_, and any given stat can have up to 252 EVs (255 prior to Gen VI) devoted to it. This means that, at level 100, you have 127 extra points, not 510, to distribute among your Pokémon's stats, with any given stat capping out at 63 extra points. Vitamins, also, are no longer capped at 100 EVs as of Gen VIII and can be used to maximize the relevant stat (provided, of course, that your Pokémon doesn't have too many EVs elsewhere). The Cofagrigus presented as a base example is impossibly weak. The numbers used are its minimum stats at level 100 (from Bulbapedia), which are calculated using zero EVs, zero IVs (the Pokémon's genetic disposition for each stat, essentially), and a hindering nature (if applicable; nature has no effect on HP). Any given nature will raise one stat by 10% and lower one stat by 10% (five natures, known as "neutral" natures, effectively raise and lower the same stat, canceling themselves out and changing nothing). Since a Pokémon can have only one nature, only one stat can be calculated with a hindering nature. A Cofagrigus with zero EVs, zero IVs, and a neutral nature would have stats more along the lines of 226 HP, 105 Attack, 295 Defense, 195 Special Attack, 215 Special Defense, and 65 Speed. The boosted Cofagrigus is also impossible, as it would need its Defense, Special Attack, and Special Defense all boosted by its nature in addition to having 252 EVs each. That Speed stat also requires at least 32 EVs.

  91. a bledsoe

    a bledsoePred mesecem

    Pretty sure it was introduced in mystery dungeon

  92. divineblood

    divinebloodPred mesecem

    The easiest way for me to get the pokerus is through wondertrade. Not sure if the trading system contributes to it. Within several trades I would get it and then I would spread to all my Pokémon. 🤔

  93. Zimvgig Uolivich

    Zimvgig UolivichPred mesecem

    so this video was intentionally created during this era of pandemic???😂🤣

  94. Christian Petty

    Christian PettyPred mesecem

    I learned something new today ev training is a thing and the pokevirus is a thing.

  95. Joseph Cantu

    Joseph CantuPred mesecem

    Ok so 1 minor detail. EV's do mostly work the way he described but not nearly as efficient. It takes 4 EV's to increase the stat by 1 and no stat can have more than I believe 252 EVs so you can only increase the stat by around 60. I know my math is slightly wrong but there is definitely no way you're increasing a stat by 500. It's 1/4 of that and has to be put into 2 stats

  96. Yan Mega

    Yan MegaPred mesecem

    love the random habanera playing in the background

  97. Savannah Moran

    Savannah MoranPred mesecem

    doess this apply to pokemon go on the phone?

  98. Anton Masalev

    Anton MasalevPred mesecem

    i always thought that a virus is somewhat a bug of nature, but now i think they are more a corrupt program

  99. HeckinGracken

    HeckinGrackenPred mesecem

    This makes me now want to see you delve into the lore about the "mold" in RE7 & RE8.

  100. Zeldaboy

    ZeldaboyPred mesecem

    My gf is a molecular biologist and I argue with her all the time about virus being alive. I really have nothing to back it up, I just say they are. My counter arguement though is that if they are not, then they are nano machines. Which since we have ancient dormant viruses inside our DNA then we are all cyborgs. Either way I am happy.

  101. Bennyb0y

    Bennyb0yPred mesecem

    Gotta catch em all! Pokémon!

  102. ShadowDemonKatGaming

    ShadowDemonKatGamingPred mesecem

    not alive in the sense that most of us understand it... the fact that they only have a limited viability for spreading through certain forms... like some virus can be spread through the air. in a sense the virus remains alive outside the body for a certain amount of time before it dies... so... in a way, yes they are alive, but they are not living.

  103. random Kisa

    random KisaPred mesecem

    about the "viruses are alive or not" thing: they're aliven't