Excellent Game
Very fun game. Naturally, it sucks that you can't read it but, story aside, the game isn't that hard to figure out and enjoy. It's even easier if you've played the US versions of Original Generation as most of the menus and the general layout are pretty identical. Besides, because of liscensing issues, importing is th eonly way you'll be able to play a game like this with such a wide variety of anime mecha.

Less Famous Robots
Not musch as J.but is quite good

Not as good as J, but still a fine game.
J is best up to date, but if you want really good Getter Robo story then get D.

No title
The game's just like ZOE for the GBA, so if you've played that you won't have much trouble, the array of charachters is great and the animations are great to look at.

Great robo game
This game is a must buy, has a wide selection of robots and has an array of challenging missions.