Does Happiny NEED an Oval stone to evolve?
Yes. Happiny needs to be at maximum happiness, and holding an Oval Stone. If she levels up while meeting these requirements, it will evolve into Chansey.
Hope I helped.
How to change your username
How to add a user avatar
Why was my post hidden?
Flags vs Downvotes
Official PokemonDb League
Type a Pokemon name, type, move or ability to see instant results.