Overworld: Tunnel to the Top
Static Encounter: Tunnel to the Top (Overcast)
Max Raid Battle: Ballimere Lake (Only in Shield), Frigid Sea (Only in Shield), Giant's Bed (Only in Shield) + 2 more
It appears in any weather.
Its base catch rate is 45 out of 255 (higher is easier); the catch rate calculator works out your odds with each ball. For the look, the best colour match is Great Ball, Lure Ball or Strange Ball.
Evolution: Gible → Gabite (Level 24) → Garchomp (Level 48).
Gible in every game · Pokémon Sword & Shield interactive map (Galar)