Happiny will evolve only when it has max friendship with its trainer it can be level 100 when it evolves if you don't treat it good the earliest level you can get Chansey is level 2!
Koffing evolves into Weezing at level 35
level him up to level 30
raise him to level 30
it does not evolve but level it up it is a strong Pokemon
you have to give it something and then level it up and it will evolve in Pokemon pearl
she can not
it evolves by holding oval stone and level up in daytime
thunder stone
Shellos evolves into Gastrodon at level 30.
Koffing evolves into Weezing at level 35
croagunk evovles at level 38 or 37
let happiny hold the oval stone and train it one level and it will evolve
you level it up during the day with max friendship
With an oval stone, you can evolve Happiny into Chanssey.But, you need to make Happiny hold that stone and then level it up in order to evolve.
Nidorino doesn't evolve by level it evolves by moon stone
charmander at l.16 and charmeleon at l.36
it doesn't evolve at a level. you need to use an oval stone at day time. hope this helped