Sonic Dash, the endless runner app for iOS devices, is currently featuring a guest appearance by Zazz, an enemy from Sonic: Lost World. Zazz is one of the members of anti-Sonic brigade The Deadly Six, and uses a flying mech. Players will need to swipe left and right to avoid his projectiles, or swipe up to jump over them.

The update that enables Sonic Dash's first boss fight also introduces the Deadly Six Card Collection Challenge. In this challenge, players collect unique cards that will unlock special Lost World-themed prizes when enough have been collected by the community.

The card challenge and boss fight against Zazz are only available for a limited time, though the press release announcing the events did not specify at what date the events would end.