Spore Hero Arena

"Spore Hero Arena is the Nintendo DS spin-off of Spore Hero. Spore Hero Arena allows the player to move around an overworld with slight exploring and puzzling. On each planet there are six blue shards to collect by doing certain missions or jobs assigned the player by the creatures that inhabit that world. These missions can vary from being a bodyguard, racing, and of course, arena battles. Once you get all six you can turn them into a specific creature at the front of the champion's arena."

Source: Wikipedia, "Spore_Hero_Arena," available under the CC-BY-SA License.