Level up after reaching 220 Happiness. By the time Chansey reaches 220 Happiness, she's ready to evolve. To do this, players simply need to fight until Chansey manages to level up.

What level does Chansey evolve at?

In order to evolve Chansey, you'll need to raise its happiness level up to 220. To do this, you'll simply give Chansey the Soothe Bell. This handy item will increase the holder's friendship and will make this process much quicker.

What level does Blissey evolve?

Blissey (Japanese: ハピナス Happinas) is a Normal-type Pokémon introduced in Generation II. It evolves from Chansey when leveled up with high friendship. It is the final form of Happiny.