Cleffa is one of those annoying Pokemon without an evolution level. The only way to evolve it is with maximum love.
it evolves at level 35
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
cleffa
level 18
at level 30
level 50
Level 18
Level 20.
at level 14
Level 20