Toss Boys/Unused

Rhythm Tengoku
Toss Boys consists of the following versions in Rhythm Tengoku:

Unused Content
While each character has their own Special Move in the game, technically they are all capable of performing any Special Move with any combination of characters. They have voice clips for all possible combinations, not all of which are used. All three are also capable of popping the ball, something only Kii-yan does in the game.

In the Remix 5 version, Aka-chan's sprite for squatting while perfoming an AB TossToss was not updated to use the lowercase "a" as seen in her other sprites, and thus temporarily turns it into an uppercase "A" instead.

Miscellaneous
In Toss Boys, there are two yellow pixels between the button platforms Aka-chan and Ao-kun are standing on, implying the background was intended to be yellow.