Simply the greatest GBA fighting game ever made.
Gameplay: 10/10: 3-D arenas to run around in, all the main characters, hundreds and hundreds of attacks, great collecting system...need I say more? The game has you running around on missions to help a little, adaptive robot find it's meaning and history. Throughout the game, you'll fight many battles against three to four opponents at once.
Graphics: 9/10: The graphics are a mixed bag. The arenas are of 3-D coloring, objects, and capabilities, but aren't usually filled with incredible detail. The characters though, are in 2-D form and capture the exact sprites of other games.
Sound: 8/10: The sound is where this game is iffy. You get the basic gist of what's going on, but not much else.
Value: 10/10: Great, great value here. After winning battles, you'll collect cards, which are used to unlock moves, more than five hundred in all. This system has you sorting through the deep gameplay system to pick out which attacks are right for you. This will also have you playing battles over and over again to get the card you want. This is not something you will grow tired of though, as battles always seem to play out differently.
Overall, Sonic Battle is a great way to sit down and enjoy free time during travel or any other time you're away from home.