Unlike the other games, evolution in Pokémon Legends: Arceus is done manually. You need to meet certain requirements, too. Turning your Hisuian Sneasel (a Poison/Fighting regional variant) into a Sneasler, its evolutionary line unique to Hisui is the same.
Evolving your Hisuian Sneasel is similar to evolving its Johto counterpart: you need to use a Razor Claw on it. You can purchase a Razor Claw in Jubilife Village for 1,400 Merit Points (MPs).
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Sneasler gets a big boost in Atk upon evolving and it’s naturally fast (even as a Sneasel). Effort levels (EL) can be maxed for all stats but if you need to prioritize, dedicate your grit items into its Atk and Spd. If the Sneasel that you caught is small, know that you have an advantage. Smaller Pokémon get a small boost in Spd compared to bigger ones.
It’s strong against many types, including its own (Fighting and Poison), as well as Grass, Bug, Dark, and Rock. It’s very weak to Psychic and vulnerable against Ground and Flying—all of which are uncommon types in the game. As such, it’s arguably one of the best Pokémon to have in Legends.
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