Dewgong, the Sea Lion Pokémon. The evolved form of Seel. This Water/Ice Pokémon can easily resist extreme cold.
– Ash’s Pokedex
Dewgong-gong-gong! Dewgong is the first Ice type Pokemon in the National dex order. It’s based on a manatee, but to me, looks more like a seal with a mermaid’s tail.
Stat-wise, Dewgong has more Defense and HP than Attack. It can have Thick Fat or Hydration for abilities. Thick Fat can make it triple-resistant to Ice, but I think Hydration is probably more useful, especially on a rain team.