For the final boss that plays the "Final Fever" music track, see .
Metallic Madness boss
Final Fever was the cut true final round of the 2011 remastered version of that was only able to be accessed if the player had all of the Sonic the Hedgehog CD Time Stones. It is named after the music track that normally plays during the Metallic Madness boss.
According to the director of the 2011 re-release of
Sonic the Hedgehog CD, Christian Whitehead, it would have taken place in a distorted time warp and the boss was planned to be virtually invincible in its current form. The only way to defeat it would be to warp speed to "wind back the clock" and destroy parts of it when it was more vulnerable (possibly being built). It was planned to use the "Final Fever" music track, with the previous boss using the standard boss theme if this round is next. Interestingly, it bears an "R-9" mark - a reference both to Robotnik and it being the long awaited ninth Round (should R2 be completed).
Sonic | Tails | Amy | Dr. Eggman | Metal Sonic | Animals ( Flicky, Pocky, Ricky, Pecky, Sheep, Swallow)
Badniks Amenbo | Antlion* | Anton | Bata-Pyon | Bigbom | Dango | Ga | Hotaru | Kabasira | Kama-Kama | Kanabun | Kemusi | Kumo-Kumo | Mecha-Bu | Minomusi | Mosqui | Noro-Noro | Pata-Bata | Poh-Bee | Sasori | Scarab | Semi | Taga-Taga | Tamabboh | Tentou | Tonbo | Yago
Rounds Palmtree Panic | R2* | Desert Dazzle* | Collision Chaos | Tidal Tempest | Quartz Quadrant | Wacky Workbench | Stardust Speedway | Metallic Madness | Special Stage | Bonus Stage*
EGG-HVC-001 | R2 Boss* | Collision Chaos Boss | Tidal Tempest Boss | Quartz Quadrant Boss | Wacky Workbench Boss | Metal Sonic | Psyco-Egg | Final Fever*^
Propeller Flying^ | Ring Spark Field | Spin Jump | Super Spin Attack | Super Spin Dash | Super Peel Out | V. Maximum Overdrive Attack
Ring | Monitor ( Extra Life, Invincibility, Power Sneakers, Super Ring, Shield, Time Bonus) | Spring | Star Post | Bumper | Switch | Air Bubbles | Signpost | Capsule
Breakaway Bumper | Chopper Block | Conveyor Belt | Cosmic Eternity - Believe in Yourself | Crusher | Dash Zone | Debug Mode | Fan Block | Electric Generator | Flipper | Flywheel | Freeze | High-speed warp tube | Little Planet | Little Planet flowers | Metal Sonic Projector | Never Lake | Robot teleporter | Rotating platform | Seesaw | Shuttle loop | Size Beam | Snowblower | Sonic Boom | Sonic the Hedgehog Boom | Sonic - You Can Do Anything | Spring Pole | Time Attack | Time Stone | Time Warp Plate | UFO | Winding Tunnel
*Scrapped information about
Sonic the Hedgehog CD. ^Wasn't mentioned in the Sega Mega-CD release of the game.