Dr. Robotnik's Mean Bean Machine

A Tetris-like puzzle game that involved the placing of four same-colored beans adjacent to each other in order to get rid of them. Doing this at the same time is an opponent. Whoever fills their screen to the top with the beans, loses.

Although this is all you need to do to get anywhere in exercise mode, you'll usually need to drop "refugee beans" on your opponent by creating chain reactions. These beans are both annoying and helpful, as they can only be cleared when adjacent to another bean that is being removed, but they are very useful for making chain reactions.

The game itself used characters from the Adventures of Sonic the Hedgehog cartoon, and was basically an edited Puyo Puyo.

Boxart

http://web.archive.org/web/20031223152227/boxscans.sonic-cult.org/meanbean-box-us.jpg

Sonic the Hedgehog games for the following systems

1991  Sonic the Hedgehog | Sonic Eraser     1992  Sonic the Hedgehog 2     1993  Sonic the Hedgehog CD | Dr. Robotnik's Mean Bean Machine | Sonic Spinball     1994  Sonic the Hedgehog 3 | Sonic & Knuckles     1995  Chaotix | Sonic Classics     1996  Sonic 3D: Flickies' Island      Prototypes  Sonic the Hedgehog | Sonic the Hedgehog 2 | Sonic the Hedgehog CD | Sonic Spinball | Dr. Robotnik's Mean Bean Machine | Sonic the Hedgehog 3 | Sonic & Knuckles | Knuckles in Sonic 2 | Chaotix | Sonic 3D: Flickies' Island  Unreleased  Sonic the Hedgehog (Mega-CD) | Sonic the Hedgehog 2 CD | Sister Sonic | Treasure Tails | Sonic-16 | Sonic the Hedgehog 3 Limited Edition | Sonic Sports | Sonic Mars