These games are definitely not part of the Sonic canon.
Dr Robotnik's Mean Bean Machine
- (Mega Drive, 1993; Game Gear, 1994)
Status of Knowledge: Manual story: doesn't exist || Character profiles: don't exist || Strategy guide: doesn't exist
Why isn’t it canon? It is set in the story line of the DIC "The Adventures of Sonic the Hedgehog" cartoon series.
Sonic Spinball
- (Mega Drive, 1993)
Status of Knowledge: Manual story: translated || Character profiles: don't exist || Strategy guide: doesn't exist
Why isn’t it canon? It is set in the story line of the DIC "Sonic the Hedgehog" cartoon series.
Knuckles in Sonic the Hedgehog 2
- (Mega Drive, 1994)
Status of Knowledge: Manual story: doesn't exist || Character profiles: don't exist || Strategy guide: doesn't exist
Background information: This is the combination of Sonic & Knuckles and Sonic 2.
Why isn’t it canon? It has no formal story line and features elements that were destroyed in previous games (most noticeably, the Death Egg).
Sonic X
- (Animation 2003 - 2004)
Why isn’t it canon? Yuji Naka has stated that although Sonic X is based on the games, it is set in a different continuity.