How can you tell if your Pokemon has Pokerus on Emerald?

Question

question should say it all

Answer 1

Look here for the answer.
Basically, Nurse Joy tells you and there's a symbol that says PKRS on the Pokemon's Summary.

Comments

so nurse joy tells you?

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PKRS. Not PRKS. Just saying.

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Yes nurse joy tells you when you heal your pokemon. A trick is keep on healing your pokemon at the pokemon center until they have it.

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once you get it you want to keep it http://bulbapedia.bulbagarden.net/wiki/Pok%C3%A9rus makes poke life alot easier