I highly recommend evolving your Skitty at level 46. By then, it will learn it's final move, Play Rough. And since Delcatty is better at physical moves, it's a way better choice than Disarming Voice.

What is Mudkips hidden ability?

Torrent. Damp (hidden ability)

What level does Ralts evolve?

Ralts (Japanese: ラルトス / Ralts) is a Psychic-type Pokémon, and is one of the official Pokémon featured in Pokémon Altair and Sirius. Ralts can evolve into: -Kirlia starting at level 20, which evolves starting at level 30 into Gardevoir when Attack > or < Defense or Gallade when Attack = Defense.