Happiny. You need to make it hold the Oval stone and level it up before it evolves.
Chansey evolves from an Oval Stone.
The Charzard evolves into a Charmander.
Hapinny
Happiny evolves into Chansey with an Oval Stone.
It evolves Happiny. When Happiny levels up during the daytime while holding the Oval Stone, it will evolve into Chansey.
Happinny is the only Pokemon that can evolve with the Oval Stone.
The Oval stone evolves Happiny into Chansey.
happini can evolve with a oval stone
Happiny
It will evolve a happiny to a chansey (but if you do that on Pokemon diamond or pearl i don't think you can get another happiny so beware!).
Happiny evolves into Chansey. It evolves with a oval stone in the day
togetic