Uvium (Japanese: Yunran) is a Neutral element Pokémon.

Much like Blissey being a purveyor of happiness, the equally-selfless Uvium is a purveyor of pacifism.

Pokédex Entry

In the past, the determination of Uvium inspired humans and Pokémon to work together instead of against each other.
 

References

Evolution

Happiny (M) >> Tretum (Oval Stone) >> Uvium (Max Friendship)

Name Origin

English - Combination of the words 'union' and 'ovum'.
Pronounced 'yoo-vee-um'

Japanese - n/a