Weedle evolves INTO Kakuna at Level 7
Kakuna evolves INTO Beedrill at Level 10
For more information, please try the following two sites:
http://pokemondb.net/evolution
http://www.pokemon.com/us/pokedex/
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