As the first evolution, Sneasel will likely be easier to encounter during Sleep Research. You can evolve it to Weavile using 80 Sneasel Candy and the Razor Claw item. However, you will still need ...

Note that the base form must be Hisuian to evolve to what's featured in the above list. For example, a Johto Sneasel can never become a Sneasler. Likewise, a Sneasel caught in Legends: Arceus ...