I found the BW game really hard. 3rd person shooter and using a digital pad on the PS1 made movement and shooting harder than it should be. Plus the fact that you energy would ebb away in robot mode and you couldn't attack in beast mode. PLus transforming would take a while and you would be getting shot at. Man what a dud game.
Oh I also forgot the DS Animated game. I quite enjoyed that, being a fan of puzzle games