G-merl

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Gemerl (ジーメル), also known as G-Mel, Gemel, and other variations (there is no official English name), is a Robotnik mech who debuted in the Game Boy Advance game Sonic Advance 3. Gemerl would serve as a secondary antagonist throughout the game: Gemerl had the ability to "merge" with other machines, and as such co-piloted all of Eggman's boss vehicles. Also, Sonic and co. fight against him in Act 3 of Sunset Hill, Toy Kingdom, and Cyber Track; and also as miniboss in Route 99 and Altar Emerald. Gemerl has black, yellow, and white skin and red and blue eyes.

Gemerl bears a great deal of rememblance to (and derives his name from) Emerl, the prototype Nocturnus Gizoid whose development forms the core of Sonic Battle's story. However, the precise nature of Gemerl's relation to Emerl is unknown. It is stated that Dr. Eggman created Gemerl from Emerl's "data", which would seem to imply that Gemerl is merely an advanced Phi series robot. However, events later in the game would suggest that Gemerl incorporates some of Emerl's hardware and memories, indicating that he may in fact be a partial rebuild of the Gizoid.

Unlike Emerl, Gemerl often uses his jetpack, either to fly or to tackle enemies. He can also teleport, fire barrages of missiles, and create a red energy shield around himself.

Gemerl appears as the extra boss of the game if the player has collected all the Chaos Emeralds. The Emeralds cause Gemerl to become unstable and destructive, in much the same way as Emerl's destabilisation in Sonic Battle as Emerl. Gemerl betrays Eggman by throwing him at Sonic, then escapes and transforms into an orb shaped machine. Sonic turns into Super Sonic and teams up with Eggman to fight Gemerl in the final boss, Nonaggression. (Notably, the music that plays during the Nonagression stage is a remix of Emerl's theme from Sonic Battle.) This orb form of Gemerl had four extendable arms with claw-like hands that could fire energy beams and missiles. His only weak point is his gem, which is protected and impossible to harm unless Super Sonic charges Eggman's Egg Mobile with energy and throws him at Gemerl.

After he is defeated, Cream the Rabbit and her mother, Vanilla, find his broken body on the beach, and take him to Tails. Tails then proceeds to repair Gemerl, who seemingly remembers Cream, becoming her friend once more.

Friends/Allies

 * Cream the Rabbit (in the ending)
 * Miles "Tails" Prower (in the ending)
 * Vanilla the Rabbit (in the ending)
 * Dr. Eggman (former)
 * Sonic the Hedgehog (in the ending)
 * Amy Rose (in the ending)

Enemies

 * Dr. Eggman