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"Similarity between general structure of Choro Q! and Gadget Racers."
I don't see anything like the crazy events in ChoroQ 3, but this Choro game with a terrible western name has enough little super-deformed racers, tracks, part upgrades, and awards to keep you busy for quite some time. Plus you've got analog steering (yay!) and some very smooth graphics that are a lot easier on the eyes than the PS games in the Choro series.
The interface is pretty, the music is peppy, the AIs are a bunch of little bastards, the game always rewards you just enough to keep you slavishly addicted, and life is good.