Lego Dimensions is an action-adventure game in which Lego versions of various franchises cross-over. It follows the toys-to-life format that Skylanders started where the game comes with a portal on which you place Lego figures which you can then use in the game. Sonic is one of the characters in the second series of packs released for the game.
Inclusion of Sonic the Hedgehog
Fast facts on Sonic Level Pack
Manufacturer: Warner Bros. Interactive Entertainment
Sonic the Hedgehog was announced as as a level pack as part of Wave 7 and released in November 2016.