Heliolisk locations — where to catch

In Lumiose City (Legends: Z-A)

• Wild Zone 20 — Walk

Other games (3)

• Sword / Shield — The Isle of Armor (Gen 8): Max Lair
• Sword / Shield (Gen 8): East Lake Axewell, Giant's Mirror, Lake of Outrage, Rolling Fields
• Ultra Sun / Ultra Moon (Gen 7): Ultra Space Wilds

Heliolisk — full Pokédex entry