Type Chart changes
>Fix it's relation with Water. Either remove Water's resistance to Ice or make Ice resistant to Water as well. Both even.
>Have Ice resist Flying (some of the most popular attacks of the type like Blizzard, Icy Wind and Frost Breath all use wind in some capacity) and Ground.
New Pokemon designs
>Mooses, reindeer, snowy owls, white rabbits, artic wolves, lynx, snow leopard Pokemon. All could be moderately to highly fast, some hitting like a truck
>Special Attackers made of snow, or linked to northern lights
>Pokemon based on myths of cold countries, like Norse mythology or old Canadian and Russian legends
Hail
>Have the damages be influenced by type resistance
>Give Ice types some inherent stat boost, ability or not.
>Have it increase the chance of Freezing
All in all, I think that GF needs to make the Ice type more viable defensively. Just creating new fast attackers won't do it. You need to make the Pokemon we have already have some use first.
