Chansey

From the Pokémon Wiki, a database for the Pokémon series that anyone can contribute to

Chansey is a Normal Type Pokémon. It is the evolved form of Happiny, and can evolve into Blissey.

Chansey's evolve from Happiny when Happiny is given an Oval Stone and then to Blissey when Chansey's happiness exceeds a certain number. Chansey's are supposed to bring happiness and are seen carrying a stone shape egg and shares it with injured Pokemon. Chansey (and it's evolutionary line) also happens to have more items associated with it than any other Pokémon: the Lucky Punch, the Lucky Incense, the Lucky Egg, and the aforementioned Oval Stone.

[edit] In Anime

In the TV series Chansey is used as helper for Nurse Joy in the Pokemon Centres.

[edit] Mood

Chansey is an extremely brave and kind Pokémon and whatever its mood is, its always smiling.