Espeon

Eevee, art by Ken Sugimori. Psychic Purple Nekomata Force Go!

Eevee is an official Normal-type Pokémon introduced in Generation I. It is #196 in the National PokéDex.

It evolves from Eevee when leveled up with its happiness at maximum during the daytime. However, the ambient presence of a Moss Rock or a Snow Rock will take precedence when determining the evolutionary fate of an Eevee.

It's also the most catlike of the bunch. It's a kitty cat. And it dance dance dance, and it dance dance dance.

For more information on Eevee, see its Bulbapedia entry.

Evolutionary Data:
Eevee → Level up with maximum happiness at daytime → Espeon