Aggron locations — where to catch

In Lumiose City (Legends: Z-A)

• Wild Zone 20 — Walk

Other games (2)

• Sword / Shield — The Isle of Armor (Gen 8): Ballimere Lake, Frigid Sea, Giant's Bed, Lakeside Cave, Slippery Slope, Snowslide Slope
• Ultra Sun / Ultra Moon (Gen 7): Poni Plains

Aggron — full Pokédex entry