SEGASonic Bros. (found unreleased arcade puzzle game; 1993)
SEGASonic Bros. was an arcade game that was never properly released. It was a puzzle game where Sonic is joined by red and yellow recolors of himself with differing personalities, the red one being cheerful, and the yellow one more brooding/shy. In the game, the player must stack Sonic's copies (multi-colored orbs) together to earn points, similar to Cleopatra Fortune.
The game was designed by Fukio Mitsuji, and given a location test. It failed this test, and was never released, possibly being marked as one of two unsatisfactory Sonic arcade games in a press release. The game fell into obscurity for many years until Custom Robo's creator Kohji Kenjoh brought it up 20 years later, followed by a few Twitter posts on the game.
In Febuary of 2016, Arcade board collector ShouTime Posted screenshots of a working board of SEGASonic Bros to his tumblr and Twitter, sparking a massive following in the gaming community, as he also teased about dumping the game to the public, but has yet to actually happen.
Though on July 26 2018, SegaBits( Well known SEGA News Reporting Website) announced that ShouTime will be providing the playable arcade board at the California Extreme event that will be available at the event from July 28 to July 29 2018 But the ROM of the game is yet to resurface online as of now