The characters on the shirt, ordered row by row from left to right, are:
Top Row
- Mario: The main protagonist.
- Yoshi: The friendly green dinosaur.
- Luigi: Mario's younger, taller brother.
Middle Row
- Bowser: The main antagonist and King of the Koopas.
- Goomba: A common mushroom-like enemy.
- Bowser Jr.: Bowser's son.
Bottom Row
- Wario: Mario's yellow-and-purple clad rival.
- Toad: A citizen of the Mushroom Kingdom.
- Waluigi: Luigi's tall, lanky rival.