Zweilous locations — where to catch

In Paldea (Scarlet & Violet)

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

Other games (3)

• Sword / Shield (Gen 8): Bridge Field, Dusty Bowl, Giant's Mirror, Lake of Outrage
• X / Y (Gen 6): Kalos Victory Road
• Black 2 / White 2 (Gen 5): Unova Victory Road 2

Zweilous — full Pokédex entry