Sludge barely dodged the surprise attack, however it kept going and singed the side of Chuck's face as he tried to get out of the way.  Seeing this, the Grimer glared at Incineroar in anger as he began glowing.  Soon, the Grimer was gone, and in it's place was a Muk, who slammed it's fist into the ground, causing a Rock Slide to come down and hit all three Pokémon on the field as it followed up with Stone Edge, with pointed stones coming up from the ground underneath Incineroar.