To evolve Riolu into Lucario you need to level it up when it is compeletly happy with you during the day.
it evolves at level 28 and an easy way to do it is put exp share on it and go to to the Pokemon league
mightyena doesn't evolve on Pokemon pearl, he doesn't evolve in any Pokemon game!
you can not evolve it
I does not evolve
Riolu has to really really like you
snesel can'NT evolve but can evolve in Pokemon diamond, pearl and platinum snesel can'NT evolve but can evolve in Pokemon diamond, pearl and platinum
octillery doesnt evolve
Yes Corphish does evolve in Pokémon Pearl.
it doesn't evolve
it doesn't evolve
they dont evolve... even i know that
No Pokemon can evolve with a hard stone