Sonic Riders: Zero Gravity (Regravitified) 90s Boulevard (Super Sonic)
'90s Boulevard is a track in Sonic Riders: Zero Gravity. It appears to be based on the vibrant days of the 1990s, and it takes place during the night, as opposed to '80s Boulevard. The track also makes references to past Sega video game franchises, such as NiGHTS and Samba de Amigo.
also known as the Chaos Emeralds in Sonic Free Riders, is a recurring Board type Extreme Gear that appears in the Sonic Riders series. It is an exclusive Extreme Gear solely for Sonic the Hedgehog, meaning only he can use it, with the unique ability to transform Sonic into Super Sonic once he has collected a set number of Rings.