Imaginary Man is a superhero imaginary friend, created to fight Nemesis, seen only in "Challenge of the Super Friends." His weakness is flowers. When he figured out Mac could withstand it, he decided Mac had a "gift", and he should be his sidekick. He named him "Mac Attack", and Mac continuously searched for a proper catch phrase though he never found one. Nemesis is his main enemy. At the end of the episode, he and Nemesis get adopted by their creators only the other way around. He is voiced by Daran Norris.
- He can shoot mashed potatoes out of his hand.
- Can produce skateboards for shoes.
- Can squirt orange soda out of his hand.
- Has a sonic belch.
- Giant Paddleball out of his hand.
- Can fly.
- Has a mini car seat for a person like Mac's size.
- Height: 6'3
- Weight: 230 lb
- Imaginary Man's golden trading card statistics from the Foster's Home for Imaginary Friends Leapster game include:
- Truth, Justice, and te Imaginary Way!
- His arch-nemesis is Nemesister!
- Shoots orange soda and mashed potatoes.
- Calls Mac, "Mac Attack."