G-Max Volcalith (Japanese: キョダイフンセキ Kyodai Volcanic Ejecta) is a damage-dealing Rock-type G-Max Move introduced in Generation VIII. It is the exclusive G-Max Move of Gigantamax Coalossal.
G-Max Volcalith inflicts damage and, for 4 turns, deals damage at the end of each turn to non-Rock-type foes equal to 1/6 of their maximum HP..
Its power and whether it is a special or physical move depends on the move it is based on.
Gigantamax Coalossal can use G-Max Volcalith if it knows a damaging Rock-type move.