Square Enix made this arcade game about transforming cars that battle called Gyrozetter. It's pretty awesome. Then they turned it into an anime - Chō Soku Henkei Gyrozetter - to really pump up the popularity. Seems like the next step in Square Enix's plan for world domination is a collection of cards found inside Happy Meals sold in Japan from January 11.
To go with the anime, arcade game, and now collectable cards, Square Enix are also releasing a 3DS Gyrozetter RPG, which is set in the same universe as the arcade game, only with far more RPG goodness. No news on whether or not this Transformers-esque game will reach Western shores but suffice to say that Japanese kids will probably be loving it.