POKERUS Pokerus was first introduced in Pokemon Gold, Silver and Crystal. This virus,
perceived by some to be a bad 💪 thing, is in fact beneficial to the growth of your
Pokemon. In GSC, Pokerus doubled the amount of Stat Exp 💪 received at the end of battle,
meaning your stats grew twice as fast. Now in Generations III and IV, the 💪 virus will
double the amount of EVs that your Pokemon earn. Pokerus will be caught randomly by one
of your 💪 Pokemon after beating a wild Pokemon. When you next visit a Pokemon Center,
Nurse Joy will inform you that your 💪 Pokemon has been infected: Your Pokemon will
continue to have Pokerus for around three days. During this time, it will 💪 spread to
other Pokemon in your party. If you deposit an infected Pokemon in the PC, it will
pause the 💪 rate at which the virus disappears, but it will not infect other Pokemon in
your PC. On the status screen, 💪 a small "pkRS" tab will appear to show that your Pokemon
is currently infected with Pokerus. Once Pokerus disappears, your 💪 Pokemon will not
catch it again (Just like a real viral immunity). In Generation III, a small dot on the
💪 Pokemon's status screen signifies this status, while in Generation IV, a smilie face
appears. Though this Pokemon can no longer 💪 spread Pokerus, it still receives the
doubled EVs like it did before.