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The wrist-mounted crystalline device every serious Paldean trainer carries — a receiver that channels a fragment of Terapagos's power to Terastallize a partner Pokémon.
Tera Orbs look like specialized sports equipment and are actually fragments of a legendary Pokémon's power distributed across the trainer population. Each recharges by absorbing ambient Tera-energy — fastest on Paldean soil, slowest anywhere else. They can Terastallize a Pokémon once per charge and are the defining battle mechanic of the series.
A palm-sized geodesic orb set in a wristband strap, with a clear crystalline core that flares the Tera color of the user's Pokémon when activated. Each Tera Orb is subtly different — Liko's is hexagonal to match her pendant; Roy's is ruggedly angular; Friede's is scuffed from flight use.