Board Thread:Speculation, Theories, and Rumors/@comment-25400375-20150315043543/@comment-679780-20150413014808

Observer Supreme wrote: In racing games. Just because Wreck-it Ralph shows up with Sonic doesn't mean they are linked. Not just racing games, they had quite the extensive history together.

In fact Christmas Nights into Dreams was Sonic's first ever playable in 3D. Other cross overs such as Casinopolis pinball, City Escape hotels, Sonic Pinball Party, Sonic Battle and the DLC for Sonic Lost World.

While these can be passed off as cameo references, in Sonic lore these NiGHT based things could be the creation of people who has once met with NiGHTS in a dream and it stuck in their subconscious.