The Ring Fever can only be utilized during the Egg Dealer boss fight. It is activated when three slots on the Egg Dealer that correspond with the Ring Fever icon align. In gameplay, if the player manages to hit three Ring Fever icons in a row, a large amount of Rings will appear from the pillar in the center of the battlefield for the player to collect.
- Kaizen Media Group (22 November 2005). Shadow the Hedgehog: Prima Official Game Guide. Prima Games. p. 72. ISBN 978-0761551959.