Ifrit

The Ifrit is a massive fire elemental from another dimension with incredible powers and malevolent intent.

Battling Sonic
The Ifrit originated from a dimension other than that of Mobius Prime, with its existence eventually being discovered by Gerald Robotnik. Upon learning of the creature, Dr. Eggman Nega set out to harness its power for his own use. His plan involved collecting the Chaos Emeralds and several Chao, but was fortunately thwarted by an alliance of heroes that included Sonic and Silver the Hedgehogs. The Ifrit was defeated and apparently trapped, whether back in its own dimension or in another one entirely. (VG: SRi2)

A Genesis Portal later allowed the Ifrit to travel to Mobius in the region of Apotos, where it interrupted a battle between Sonic and a force of Egg SWATs commanded by Dr. Eggman. Eggman quickly fled while Ifrit destroyed the Egg SWATs, forcing Sonic to confront it. He was unexpectedly joined by his old ally Silver, who traveled from the future to investigate the threat posed by the Genesis Portals. The two managed to drive Ifrit back through the portal from which it had emerged, and then closed it behind the creature. (FCBD: 2015)

Abilities
The Ifrit commands incredible power, being capable of flight and unleashing fiery blasts. It also displayed the ability to control other beings, whether through some form of mind control or possession.

Background Information

 * The end of Sonic Rivals 2 seemed to imply that the Ifrit had been destroyed; however, the comics indicate that it somehow managed to survive.