>>46088665Chansey
Light Screen/Reflect/Ice Beam/Softboiled
Slowbro
Reflect/Amnesia/Rest/Blizzard
Snorlax
Rest/Amnesia/Blizzard/Reflect
Vaporeon
Double Team/Ice Beam/Rest/Acid Armor
Jinx
Lovely Kiss/Ice Beam/Rest/Psychic
Articuno
Blizzard/Agility/Rest/Hyper Beam
The idea is to make a stall to land as many ice moves and thus freezes as possible. I think there's a fairly decent chance of someone's entire team getting frozen. Using Ice Beam instead of Blizzard to maximize freeze chance.
Trainer type can be Scientist named MrFreeze