Does Cobalion evolve?

No. Cobalion has no evolutions.

What type is Cobalion?

Cobalion is a dual Steel/Fighting type Pokémon.

Cobalion is Steel/Fighting. It takes 2× from Fire, Fighting and Ground.

No. 0638 · Gen 5

Impish: Raises its best defense and drops Sp. Atk, which it won't use.

Hit COBALION with Fire, Fighting and Ground for 2× damage.

2×Super effective

½×Not very effective

¼×Barely scratches it

0×No effect

In Pokémon GO: Fire deals 1.6× instead of 2×. GO chart

ImpishRaises its best defense and drops Sp. Atk, which it won't use.

Worked out from base stats. Your team may need something else.

Defeating Cobalion gives 3 Defense EVs.

The strongest attacking move it can learn in each type, across all games. Not every game has every move. Same-type moves get a 1.5× bonus.

Type	Move	Kind	Power
Normal	Hyper Beam	Special	150
Steel	Steel Beamsame type	Special	140
Fighting	Superpowersame type	Physical	120
Bug	Megahorn	Physical	120
Rock	Stone Edge	Physical	100
Flying	Bounce	Physical	85
Poison	Poison Jab	Physical	80
Psychic	Zen Headbutt	Physical	80
Electric	Volt Switch	Special	70

Regular Pokémon whose same-type moves hit it hard and who take little from its same-type moves. Picked from types and base stats only, not movesets.