not sure but it has to have a high frendship lv with its owner and then u have to level it up between 4am and 8pm. then, it should evolve in to lopunny.
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
at level 14
Level 20
Level 37