Tretum (Japanese: Jouran) is a Neutral element Pokémon.

Constantly in the pursuit of solidarity, Tretum never lets an argument go unseen to - be it one between humans or Pokémon.

Pokédex Entry

It fervently dislikes those who refuse to cooperate with one another, and will leave an unsociable trainer without question.
 

References

Evolution

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

Name Origin

English - Combination of the words 'treaty' and 'ovum'.

Pronounced 'tray-tum'

Japanese - n/a