Ethan

Season One Episodes

 * "It Begins and Returns"
 * "Lost My Remote"
 * "Deep Space Nine"
 * "And They Counted"
 * "Cold Case"
 * "Hero VS Villains"
 * "24"
 * "Professor Power's Enterprise"
 * "Remote Control"
 * "The Layla Factor"
 * "Call of Duty"
 * "Elementary"
 * "A Man Called Medulla"
 * "The Lost Hero"
 * "Framed"
 * "Cool N' Out"
 * "Attack of the Clones"
 * "Fast and the Furious"
 * "Deceive and Conquer"
 * "Will's Heartless"
 * "Justice League"
 * "The Secret Files"
 * "I, Will"
 * "Return of the Bowser Jr."
 * "Parents Upset"
 * "The Army of One"
 * "Cats & Dogs"
 * "Flight of the Koopalings"
 * "Playing Games"
 * "The Ring of the Master"
 * "Planet 51"

Season Two Episodes

 * "Will Gets a Work"
 * "The Academy"
 * "Parental Bonding"
 * "Secrets of the Lost City"
 * "The Power Files"
 * "The Robot Machines"
 * "Breakout"
 * "Secret Saturday"
 * "Year of the Will"
 * "Homecoming"
 * "The Forces of Evil"
 * "Battle to Rescue"

Season Five Episodes

 * "Transylvania"

Season Twenty Episodes

 * "The High School Planet" (final appearance)