My Pokemon have a power lens and pokerus but they still don't gain over +4. Why?

Question

i have a Pokemon with pokerus and it is holding a power lens but after it levels up, it only gains +2, 3 or 4. on a Pokemon wiki I read that pokerus doubles the effort values. why isn't it doubling?

Comments

i had pokerus once...

Answer 1

It does double, you don't see them through regular leveling up. This is how I check to see the EVs gained just look at their stats before and after a Pokemon battle ans you should see the difference.

Hope I helped. :)

(My answer refers to White/Black 2 this may also occur with XY also if you're referring to it.)