How can weavile learn ice punch?

Answer 1

Weavile is not capable of learning Ice Punch in Pokémon Diamond, Pearl, Platinum, HeartGold, SoulSilver, Black or White but in Platinum, HeartGold and SoulSilver, you can take a Weavile to a Move Tutor, the Ice Punch Tutor in Platinum is in Route 212 and it requires 6 Blue Shards and 2 Red Shards and the Ice Punch Tutor in HeartGold and SoulSilver is located in the Battle Frontier.

In Pokémon Black and White, Weavile is only capable of knowing Ice Punch as an Egg Move which will originally be on its pre-evolutionary form of Sneasel.

No Pokémon within Weavile's Egg Group are capable of learning or being taught Ice Punch so you'll need to get a male Nidoking, Psyduck, Golduck, Mankey, Primeape, Rhydon, Rhyperior, Sentret, Furret, Aipom, Ambipom, Wooper, Quagsire, Snubbull, Granbull, Teddiursa, Ursaring, Slakoth, Vigoroth, Slaking, Whismur, Loudred, Exploud, Mawiole, Grumpig, Spinda, Zangoose, Kecleon, Buizel, Floatzel, Lucario, Lopunny or another Sneasel or Weavile from Platinum, HeartGold or SoulSilver and teach Ice Punch to them and then Poké Transfer it over to Black or White and then put the male Pokémon in the Daycare with the female Weavile and you'll get a Sneasel Egg that'll hatch into a Sneasel that knows Ice Punch.