The FightBox seems like a Hit Box knockoff and bears an odd resemblance to controllers made by RetroArcadeCrafts.
The Cross Up allows you to simultaneously use a joystick and buttons to input directions, creating new possibilities.
The Smolbox is a mini all-keys controller with a primary edition that utilizes the pinky finger for the second jump button.
The RAC-J800B, part of the J800 series, is an interesting all-buttons controller that is available in multiple variations.
Hori marks its debut in the generation of consoles with this fightstick that brings a slew of innovative features.
The Frame1 calls itself the most advanced in its class, and it is quite reminiscent of the B0XX but with enough differences.
The Ergobox Case is perhaps the most unique case you can use to play fighting games, and it has received such positive acclaim.
This masterpiece is potentially the smallest all-buttons controller for those who would like an option on the go.