Where to catch Sneasel

In Paldea (Scarlet & Violet)

• Area Zero — Walk
• Dalizapa Passage — Walk
• Glaseado Mountain — Walk, Static Encounter

In Kitakami (Scarlet & Violet – The Teal Mask)

• Chilling Waterhead — Walk
• Oni Mountain — Walk
• Timeless Woods — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Ice Path — Walk
• Mt. Silver — Walk
• Route 28 — Walk

Sneasel — full Pokédex entry