Mach the Rabbit is a Mobian rabbit and the drummer for the Forget Me Knots. He was briefly imprisoned during the Iron Dominion's occupation of New Mobotropolis but later rescued. When a change of direction for the band was proposed, he initially protested the band's manager, Ash Mongoose, though Mina Mongoose was able to convince him to change his mind. (StH: #200, StH: #220)
- Mach is from the scrapped "Sonic the Hedgehog Band", which appeared in concept art prior to the 1991 release of the first ever Sonic the Hedgehog game; the band was supposed to play music when a player accessed the "Sound Test" option of the game.
- Mach has yet to have actually been addressed by name within the comic itself; however, a female groupie can be seen carrying a sign reading "Mach rocks!" at one of the concerts.
- Mach's capture and imprisonment were not seen in the comic itself, but rather detailed in the official blog.
- Despite SEGA owning the rights to Mach, and therefore allowing the character to be used again in the Post-Super Genesis Wave Timeline, he has not yet made an appearance in the current comic continuity, and whether or not he will is currently unknown.