Originally Posted by Fat Furai
Oh my god, Porygon is so amazing under Hail. It's EXTREMELY bulky, and very hard to stop. Blizzard hits so hard. It completely wrecks Stall teams if you switch into Tentacool, Tracing its Liquid Ooze. Ferroseed comes in and Leech Seeds you, while takes damage. +1 Blizzard does 36%. Amazing Pokemon!
This really demonstrates how useful of an ability Trace is. If you Trace the right ability, you're golden. This is probably best shown in the 6-0 sweep, as without Fighting-types it is nearly impossible to stop a Porygon that cannot be statused.
I'd like to give a special mention of Porygon in hail. Blizzard has the same BP as STAB Tri Attack, so it will do a lot of damage to anything that doesn't resist it. The only problem is Fighting-types, but you should have an answer for those on any hail team. Scarf Porygon also does pretty well in Hail, as Blizzard is just amazing to spam.