Ice-type moves deal double damage to Grass, Ground, Flying, and Dragon-type Pokémon. However, they only deal half damage to Fire, Water, Ice, and Steel-type Pokémon. They deal normal damage to all other Pokémon types.
“ Mamoswine is not yet implemented into Pixelmon. Mamoswine Poké Icon Type Ice/Ground Pokédex...Mamoswine