Sonic battle is a fighting game where you can play as the Sonic characters during the Emerl saga. The game is basically where you fight up against other characters, unraveling the story of a robot named Emerl. This game has mostly fighting but has some RPG elements, and mini games if you ever need a break from constant battling.
Story: The story is when Dr. Eggman (Sonic's  long time nemesis) resurrects a ancient fighting robot called "Gizoid", unable to listen to his commands Dr. Eggman decides to toss the robot at Emerald Beach, where Sonic the Hedgehog finds it. Later on Sonic decides to name it Emerl for how it is powered by Chaos Emeralds. Emerl then makes friends with Tails, Knuckles, and all of Sonic's other friends (accept Rouge and Shadow). But Shadow feels as though Emerl is a threat and is set on destroying it, while Rouge plans to make Emerl into a thieving robot. After obtaining data from Emerl before he decided to toss it he was able to make copies of Emerl that listen to his commands. He uses them to find and capture though you fight them to protect Emerl (and yourself) that is all I'll say on the story (sorry if there is any spoilers).
Controls: Just a quick bit on controls the arrow keys are to move. The z button is to jump/select an action. The x button is to attack/decline an action. The a button is to guard/heal and charge Ki (tap to guard, hold to heal and charge Ki). The s button is to use your specials (depending if in the air or on the ground). Select is to go to Emerl's menu in story mode.
Emerl: The character Emerl is the entire RPG element in the game. In story mode you can customize Emerl to fit your fighting style, so long as you have the Skill points (needed for emerl to do everything) to do so.
Battle System: The battle system is similar to that of Super Smash Bros. Where you can change the rules of battle (except you can't use items), and choose the arena of your choice. The main difference is that the arenas are in a 3-D format instead of a 2-D format.
Sound: The music is sketchy in the online version but is better in the real version.
Difficulty: The game is fairly challenging for those who are not experts in fighting games, if you are then it shouldn't be too difficult.
This game is not for all players it is mostly constant fighting so its more built for fighting game fans. The mini-games are a nice touch but only accessible in multi-player (which cannot be done on this site).
So if you are a Sonic/fighting game fan than this is the perfect game for you.

Hey nice review!I found this game at Game stop one day all of a sudden and had fun playing it.No one seems to remember Sonic Battle any more.Seems to be a underrated,any way say glad you like it.

I think if you just play in netplay I think there is a chance of anyone playing multiplayer( may even work for battling Pokémon in any of the games that have an additional floor to the Pokémon center

Ohh the game sound fun to play might try it out later, and great review.

To be honest i never really heard of that game but i think i might try it out based on the title. Thanks for the review i like it.

mr.keys : Thanks and for the record this review was done before the Netplay was added to Vizzed.

I never really liked this game. Its kind of annoying, the rough 3D scenery makes it look bad, and its quite confusing. I don't know much though I can't judge the game very much. Great review theres a lot of detail in it.