Description: In the Sonic the Hedgehog series, there are arguably a few references to Dragon Ball. Both the Chaos Emeralds and Super Sonic are nods to Toriyama's work. According to the Japanese strategy guide for Sonic Jam, the special stages in Sonic 3 and Sonic & Knuckles were inspired by (North) Kai¨­-sama's planet. The Jewel Radar, which bears a strong visual and functional resemblance to the Dragon Radar, is mentioned in the Sonic the Hedgehog 3 Japanese manual and appears in Sonic Riders. The last reference is noted through the comparison of Sonic characters to Dragon Ball Z characters, with Sonic mimicking the role of Son Goku, Shadow taking on the role of Vegeta, Knuckles with the role of Piccolo and the time-travelling Silver to resemble Future Trunks. In Sonic Riders an Extreme Gear called 'Hovercraft' is a large cloud, similar to that of the Nimbus Cloud that Son Goku rides in appearance.