Rhythm Tweezers/Unused

Rhythm Tengoku
Rhythm Datsumo consists of the following versions in Rhythm Tengoku:

Early Ideas
Rhythm Datsumo was originally going to use a photo of a development staff member's face, but was replaced because the developers found it a little too gross. The onion design was inspired by the Arabian music used in the Rhythm Game, and the shape of a mosque. It was also proposed to have the hairs be removed from the head rather than the beard, but the idea "wasn't suitable for everyone", so it was scrapped.

Rhythm Heaven Megamix
Rhythm Tweezers consists of the following versions in Rhythm Heaven Megamix:

Early Builds
In the Nintendo Direct 2015.4.2 build of Rhythm Heaven Megamix, the background in Rhythm Tweezers 2 was green with bright circles. In the final build, the green color was moved to the short version of Rhythm Tweezers, and the circles were removed. These circles still exist in the game however, but are colored the same as the background, rendering them invisible. The ones in the short version of Rhythm Tweezers are replaced with squares, which are also colored the same as the background.

Unused Content
Sprites of a shaver of some kind, as well as a carrot and some kind of cone.

A sign reading ひ♥み♥っ (Secret♥) which remains offscreen. Through modding, this can be made to hide the hairs behind the sign. There also two variations reading ふふっ (Huhu), hiding only the right side, and うふっ (Uhu), hiding only the left side. This is functionally identical to the みせてあげない♥ (No Peeking♥) sign found in Remix 8 from Rhythm Tengoku, although the left half and right half variants are new.

Miscellaneous
The turnip had it's color changed from pink to brown in the arcade version of Rhythm Tengoku, while in Rhythm Heaven Megamix, it is entirely replaced with the potato.