You just have to level him up or until lvl 21.
Level it up one more level and viola it evolved
It evolves at level 37.
it evolves by ancientpower
it evolves into lumion at level 31
Prinplup evolves at lvl 36
He evolves at level 40.
Sealeo evolves into Walrein at level 44 in Pokemon Pearl. Walrein can't be caught in the wild on Pokemon Pearl and must be evolved from a Sealeo.
Floatzel does not evolve, it evolves from Buizel
it evolves with friendship
it evolves into cherim
It evolves at level 37.
he evolves by trading him
It evolves at level 31.
Lileep evolves into cradily.
lv 31 it evolves
You trade it and then it evolves into golem.
It evolves at level 20.
it evolves by ancientpower