The only Pokémon that evolves with an Oval Stone is Happiny , and it evolves into Chansey when the right conditions are met.

Quick Scoop

Which Pokémon uses the Oval Stone?

  • Happiny → Chansey is the one and only Oval Stone evolution in the main series games.

How the evolution works

To evolve Happiny with an Oval Stone, you need to:

  1. Have Happiny hold the Oval Stone.
  1. Level it up during the day (morning/daytime hours, depending on the game).
  1. When it levels up under those conditions, it will evolve into Chansey , consuming the stone in some titles.

Later, Chansey evolves into Blissey with high friendship , but that part does not use the Oval Stone.

Mini FAQ

  • Q: Are there any other Pokémon that evolve with an Oval Stone?
    A: No, only Happiny uses the Oval Stone for evolution in the main games.
  • Q: Is the Oval Stone like other evolution stones (Fire Stone, Water Stone, etc.)?
    A: Functionally yes (it’s an evolution item), but it’s more niche because it works for just one species and usually requires daytime plus level-up.

TL;DR: If you’re wondering “what Pokémon evolves with Oval Stone” for your team or for a forum trivia thread, the answer is Happiny into Chansey, during the day while holding the Oval Stone.

Information gathered from public forums or data available on the internet and portrayed here.