Wigglytuff locations — where to catch

In Paldea (Scarlet & Violet)

• Glaseado Mountain — Walk
• North Province (Area One) — Walk
• North Province (Area Two) — Walk
• Tagtree Thicket — Walk

In Kanto (Red, Blue & Yellow)

• Celadon City — Gift
• Cerulean Cave — Walk

Other games (3)

• Sword / Shield — The Isle of Armor (Gen 8): Fields of Honor, Forest of Focus, Insular Sea, Loop Lagoon, Max Lair, Soothing Wetlands, Stepping-Stone Sea, Training Lowlands
• Black 2 / White 2 (Gen 5): Dreamyard, Unova Route 1, Unova Route 2
• Black / White (Gen 5): Unova Route 14

Wigglytuff — full Pokédex entry