If you have a good competitive moveset for Buizel, post an answer below and upvote the best ones.
Be sure to include full set details in your post, e.g. items, abilities, natures and EVs. Some explanation, including the intended game mode for your set, is also appreciated. Access the full list of guidelines here.
Buizel Pokédex and learnset for reference.
Buizel (M) @ Leftovers/Muscle Band Trait: Swift Swim EVs: 252 Atk / 252 Spe / 4 Hp Adamant Nature (+Atk, -SAtk) - Aqua Jet - Bulk Up - Brick Break - Ice Punch
SubPunch (Gen 7)
Buizel @ Berry Juice Ability: Swift Swim Level: 5 EVs: 76 HP / 120 Atk / 76 Def / 236 Spe Adamant Nature - Substitute - Focus Punch - Aqua Jet - Bulk Up