Junior Super Friends

The Junior Super Friends was a trio of superheroes in training under the Super Friends.

Members

 * Former members
 * Marvin
 * Wendy
 * Wonder Dog (mascot)

Early history
They all completed their training a long time ago. Wendy went onto became an FBI agent, Marvin a dentist, and Wonder Dog's status is of national security.

Scooby-Doo! Team-Up
When came to investigate the Rainbow Ghosts at the Hall of Justice, Velma Dinkley, Shaggy Rogers, and Scooby-Doo dressed up as Wendy, Marvin, and Wonder Dog, respectively, so they wouldn't arouse suspicion to the public.

Notes/trivia

 * The fact that the Junior Super Friends are known to the public, they shouldn't buy into them being replaced if they've already left, grown up, and gone onto different things.