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!
evolve snowver at level 40
Buizel evolve at level 26.
IT DOESN'T EVOLVE
level 18
at level 30
level 28
Level 37
level 50
Level 18
Level 20.
at level 14