level 20 or 24
Geodude evolves at 25 in Pokemon diamond/pearl/platinum. but I'm not sure about any of the other games because i have not checked the other games.
I don't know when but he evolves to gravaler.
look near rocks or evolve geodude
mightyena doesn't evolve on Pokemon pearl, he doesn't evolve in any Pokemon game!
Buizel evolve at level 26.
evolve snowver at level 40
IT DOESN'T EVOLVE
level 30.
at level 30
level 50
Level 20.
Level 18