Snomon (The Snowman Pokémon)
Evolves from Snoboll (The Snowball Pokémon)
It should have a lot of HP (at least 160 base HP), be pretty slow (like a 40 base Speed, the pre-evo should be a lot faster) and have a decent Atk and Sp. Atk (like 80 base Atk and 60 base Sp. Atk) and between 50 and 60 base Def and Sp. Def.
Type: pure Ice
Abilities:
Ice Body
Filter, Shed Skin, or Natural Cure
Regenerator (Hidden Ability)
Moves: It should learn most Ice moves (particularly, Ice Ball, Avalanche, Frost Breath), many Fighting moves (such as Hammer Arm, Focus Punch, Brick Break and Drain Punch), Defense Curl, Rollout, Recover, Nature Power, Payback, maybe Curse, maybe Glaciate, maybe Earthquake, ...
Snomon should be shaped like Cacturne/Abomasnow. Snoboll can be shaped like Voltorb.