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The Japanese one we are referring to was made by a company named "Winkysoft". Its simply called "Transformers" but a LOT of people call it "Transformers Tatakai" which is bollocks. A closer name would be what it calls itself inside the game which is "Transformers: Call of the Future". The opening cutscene is VERY VERY sweet. The in-game graphics are bearable, but not super fantastical at all.
You start by picking between the Autobots/Cybertrons and Decepticons/Destrons, then you pick a character to control, followed by two allies who will follow you around and get the hell in your way and bollock the whole thing.
After every second or so mission, new allies will join you, and if you play the game through twice, you get new characters, apparently there is around 100 characters in all to play as.
You can select to have the game in either japanese or english text, but there is only English audio, obviously designed to mimic the voices of the original 80's characters, but failing quite badly. The voices DO get better though, and its NOT a matter of getting used to them, because when you start the game again they are utterly dire.
There is pretty much no chance of a non Japanese release, on account of it being totally pants. However, if you love transformers, then you will forgive it, but like shadowman said, you can't sit there and play it heaps in one sitting. Honestly, one mission at a go is about all I can take. The characters turn like Resident Evil but take twice as long, blocking is useless if theres more than two enemies attacking you, you have to tap a button to spin around to face your enemy, or you WILL get owned trying to turn to face him between attacks.
Jump on youtube and type in "Transformers Tatakai" and you will get some pretty neat videos. Might I suggest the intro/opening sequence, as that is VERY VERY *&^%ING AWESOME.
Mind you, I like the fact that its in english but they address each other by their Japanese ranks, like "Oh no! Its the Mighty Emperor Of Destruction, Megatron!" and Prime's voice often breaks "Stop it, Meeeegatron!".
Oh and of course, there's the TF-The Movie game, which apparently is pants, but you know, being a transformers fan, I forgive it.
Hell, its Grand Theft Autobot, except you ARE the vehicle as well.
I'm tempted to start a TF thread, both about the games and the...well the rest of it, you know. I've noticed some non gaming collections posted and well...., I've got a VERY kickass collection. Talking 350+ toys, *&^%loads of merchandise as well. If there's any interest I'll be happy to post some photos I took of my collection when it was all set up before I moved into my own place.