If you have a good competitive moveset for Spheal, 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.
Spheal Pokédex and learnset for reference.
Spheal (M) @ Eviolite Trait: Thick Fat EVs: 196 HP / 196 Def / 116 SDef Bold Nature (+Def, -Atk) - Toxic - Super Fang - Substitute - Ice Beam A stalling set is probably best. Evoite buffs its defs while super fang halfs pokemons hp and toxic stalls.