Catso

Catso is the main antagonist of Runaway Ralph.

Role
When Ralph gets lost in the woods, Catso finds him and demonstrates his hunting techniques on him to his son, Merton. He then tosses Ralph high into the air and prepares to eat him, but Garf Jerringa saves him and takes him to the art room with Chum.

Later, Merton sneaks into the art room and mistakens Karen's watch for a live mouse, so he brings it to Catso. However, Catso scolds him for being fooled and decides to catch Ralph himself. That night, he sneaks into the art room and Chum tries to warn Ralph, but Ralph ignores him. Ralph notices him and hides in fear. Catso lunges at the cage and knocks it over, freeing Ralph. A chase is ensued and Catso accidentally flings Ralph onto a toy plane. He knocks it down and it flies across the room before hitting a wall. Catso corners Ralph, but Garf arrives and yells at Catso to get out.

After Karen blames Garf for stealing her watch, Ralph decides to get it back himself. He takes it back from Merton and Catso chases him into a hole. Ralph uses the students' shoelaces to get himself up onto the porch and ties Catso's tail to help him get up. Ralph taunts Catso and he lunges at him, but the string pulls Ralph up and Catso realizes he's been tricked. Catso saddens in embarrassment and Merton asks him about the string tied to his tail, but he hides it from him.