Seel is just pure water? Seems I have the same problem then, I thought both of it's evolutions were part ice.
I think that's due the fact that it's based on a seal.
Something I find weird? Psyduck, which has "Psy" in its name and is pretty well known for its psychic powers, isn't even part-Psychic. Both it and Golduck are pure Water-types.
