Agent Kleinboard (Sky High: 8th Grade Superheroes)

Season One Episodes

 * "It Begins and Returns"
 * "Hero VS Villains"
 * "Freeze Girl"
 * "Elementary"
 * "King Dedede VS Royal Pain"
 * "Return of the Bowser Jr."
 * "The Ring of the Master"
 * "Planet 51"

Season Two Episodes

 * "Secrets of the Lost City"
 * "Breakout"
 * "Secret Saturday"
 * "The Forces of Evil"
 * "Take This City"

Season Three Episodes

 * "Gotham"
 * "Commander Attack"
 * "A Talented Mr. Stronghold"

Season Four Episodes

 * "Fallen Hero"

Season Five Episodes

 * "Transylvania"

Season Twenty Episodes

 * "The High School Planet" (final appearance)