Cameos
Mario & Luigi
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In the storyline to episode 10, "Do Your Best, Big Brother! Are Water Leaks Prohibited in Dreams!?" Takuya must avoid wetting the bed. He is dreaming of leaking pipes, while two moustach-wearing plumbers from the "Water Bureau" try and mend them. One of the plumbers is short and wearing a red shirt, while the other is taller and wearing a green shirt.
The plumbers are based on Mario and Luigi, heroes of the Mario series. If you fail, they jump around breaking blocks off the top of the screen.
Returning Characters
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A number of characters from Hey! Fight! Ouendan and Elite Beat Agents make appearances in stages in Hey! Fight! Ouendan 2:
- The TV Reporter
- The romantic hero
- The cat (unlockable character, and appears as Meowzilla)
- The potter returns as a client at a Geisha house
