There are no straight Ice pokemon. Ice was once the most powerful type but now fire is resistant to
it and fire is pretty common on most teams so icers are much less useful and thus uncommon in G/S.
Smoochum
Jynx
Fast with low defense and high special. Yes they are wierd and ugly but Jynx can really kick some butt if properly trained.
They don't have many weaknesses except for fire. The only non-grass or bug pokemon to get sweet scent. Use it with lovely kiss
to simulate spore.
Articuno
Being a legendary bird it has very good stats all around. It does have a double weakness to rock which is a big problem in G/S
because rock and fire are fairly common types in G/S. Blizzard as an attack was reduced in accuracy in G/S so it's more like thunder was in R/B/Y
in that regard.
Sneasel
Covered under dark types
Cloyster,Dewgong,Lapras
Covered under water types
Swinub
Take Down, Bite, Body Slam, Rock Slide, Ancientpower
Piloswine
Yeah well it's a pile of something. It's really probably more of a ground type than anything. It has very little
special attack or defense. Unfortunately the ice type mostly adds extra weaknesses. It would probably be best with
ancient power or rock slide. Ancient power might be better given the ten percent chance of of an all around stat boost.
Delibird
Delibird is one of those really wierd pokemon. It has horrible stats-It's stat sum is lower than a LOT of unevolved pokemon.
And the only attack it ever learns is present which is a total gamble. It's a flying ice type and can get Aurora Beam, Quick Attack, Future Sight, Splash, Rapid Spin
through breeding. I haven't figured out any sort of use for it yet. . . .