Metagross locations — where to catch

In Lumiose City (Legends: Z-A)

• Wild Zone 20 — Walk

In Blueberry Academy (Scarlet & Violet – The Indigo Disk)

• Canyon Biome — Static Encounter

Other games (4)

• Sword / Shield — The Isle of Armor (Gen 8): Frigid Sea, Giant's Bed, Path to the Peak, Snowslide Slope
• Black 2 / White 2 (Gen 5): Giant Chasm
• Black / White (Gen 5): Giant Chasm
• Colosseum (Gen 3): Realgam Tower

Metagross — full Pokédex entry