Sonic Rush Adventure
Deep Core (ディープコア Dīpukoa?) is the true final stage of Sonic Rush Adventure. Taking place deep beneath Southern Island, Deep Core is a magma-filled ruin where the access point for the Power of the Stars lies. The player can only access Deep Core by obtaining all the Chaos Emeralds and Sol Emeralds and by defeating the Ghost Titan at Big Swell.
Located underground, close to the mantle of Blaze the Cat's planet, Deep Core is a seemingly endless red and black tunnel with a river of magma flowing through it, symbols on the walls, and white arches resembling bones. At one end lies a pedestal from where the Jeweled Scepter can unlock and tap into the Power of the Stars.
Having stolen the Jeweled Scepter, Dr. Eggman and Dr. Eggman Nega traveled to Deep Core in their Egg Wizard to harness the Power of the Stars with the scepter and build their ideal paradise, Eggmanland, across Sonic's world and Blaze's world. Though Sonic, Blaze, Tails and Marine followed the doctors in the Magma Hurricane, they were too late to stop them from empowering the Egg Wizard with the Power of the Stars.
As the mech's sheer power shirred up earthquakes that separated Sonic and Blaze from Tails and Marine, Eggman Nega boasted that he would wipe Blaze's kingdom off the map with the power he now wielded. However, Sonic kept the enraged Blaze under control and the two used the Chaos Emeralds and Sol Emeralds to become Super Sonic and Burning Blaze; together, they double-team with the doctors in the Egg Wizard.
As the Egg Wizard was on the verge of defeat, Eggman Nega, in a fit of insanity, prepared to fire the "Planet-Buster Laser" which would destroy the world, much to Eggman's distress. However, Marine distracted the Egg Wizard in the nick of time with an energy blast to its head, enabling Super Sonic and Burning Blaze to defeat the Egg Wizard and the doctors for good.
The boss of Deep Core, and the only playable section of the stage, is the Egg Wizard, a large mech wielding the Jeweled Scepter and piloted by Dr. Eggman and Dr. Eggman Nega. It can be fought immediately after entering Deep Core. For this boss battle, the player controls Super Sonic and Burning Blaze at the same time.
In battle, the Egg Wizard uses a number of attacks, like launching fireballs, generating dragons of fire, shooting paralyzing beams and summoning meteors. It can also stir up the magma below it with the Jeweled Scepter and fire large missiles. While none of its attacks can hurt the characters, they will delay them. To defeat the Egg Wizard, the player must reduce its health to zero three times, as it regenerates some of its health each time it reaches zero.