Chuck twisted is Firium Z he recently obtained and told his Turtonator "Alright Megumin, time to let out a maximum power Inferno Overdrive!"  He did the dance for the Z-Move and Megumin unleashed the full power of her Shell Trap into a massive blast of fire that hit the Golem, knocking it back into the Steelix, engulfing both in flames as the Explosion went off.