Read more about Emerl at: Wikipedia

Official Site: Sega

Sonic Battle is a fighting game in the Sonic the Hedgehog series, developed by Sonic Team and published either by Sega (in Japan) or THQ (outside of Japan) for the Nintendo Game Boy Advance. This is the second Sonic fighting game, the first being the 3D arcade game Sonic the Fighters.

About 4,000 years ago, a sentient weapon called the Gizoid was created by an ancient civilization. After being lost for millennia, the Gizoid was unearthed and researched by Prof. Gerald Robotnik. It remained dormant for another half century before being discovered by Gerald's grandson, Dr. Eggman. Frustrated at his inability to get the dormant Gizoid to work properly, Eggman abandoned the Gizoid at Emerald Beach, where it was discovered by Sonic the Hedgehog.

The Gizoid, which Sonic names Emerl, gets wrapped up in the affairs of Sonic's friends, allies and rivals. Through his encounters with Sonic, Tails, Knuckles, Amy, Cream, Rouge, and Shadow, Emerl grows and evolves from a soulless robot into a fun-loving mech with lots of personality. But while the gang is having fun raising their new mechanical friend, there are those who recognize Emerl's true power. Now that the Gizoid is working again, Eggman's got his eye on it and has rebuilt E-102 Gamma to track it down, Rouge wants to turn it into a master thief, and Shadow senses that, despite their efforts to humanize him, Emerl is still designed and programmed to be a weapon of mass destruction (and he also believes the same for himself). This is proven in the last fight, where Emerl fights Eggman and reveals his dark side when Eggman overloads him with energy causing him to revert back to his old programming as well as releasing all restraints on his power. He is about to destroy the world when Sonic comes and destroys him. Emerl tells everyone that he was thankful for meeting them and that they were good friends. Emerl mechanically combusts, leaving an Emerald Shard behind as his remains. However, Sonic tells everyone that they will see him again someday.

Battles are fought in 3D arenas with up to 4 players. Each character has a set of attacks and abilities. The majority of attacks are used with B, including the combo (1st, 2nd, and 3rd Attack), Air Attack, Upper Attack (used to knock opponents straight up), Heavy Attack (used to knock opponents away), and Aim Attack (used to pursue an opponent after the Heavy Attack). The A button is used to jump, and the L button lets the player block attacks, or heal damage if the button is held. The playable characters also have unique special moves, the three types being Shot, Power, and Set. Shot moves center around using a projectile to damage the opponent from a distance. Power moves focus on dealing damage quickly in a single move. Trap moves generally involve using a type of bomb to surprise-attack the enemy. However, only a limited number of special moves can be selected. Shot, Power, and Trap must be allocated to three slots: Ground, Air, and Defend. The special move you set to Ground will be used when you press R on the ground. The move you set to Air will be used when you press R in mid-air. The last slot, Defend, has a different function; When a player sets a certain type of special move to Defend, then every time an enemy uses the same type of special move set to Defend to attack, it will automatically be blocked.

Emerl has not been a contender in any CBUB matches.