Mystical Ninja Starring Goemon, though I'm not sure what its proper title was. It was localised as this in English-speaking territories as one of the few Ganbare Goemon games to get outside Japan.

The camera sucked, the game was glitched to death and even despite all this the game was actually intensely easy; I beat it in about two days because there's a guy you can always pay 10 coins to find out where to go next and what to do. Each character has like maybe one weapon or special ability that's ever useful more than once and in the end it'll just be down to which skin you'd rather have on your player.

I've played this game an unholy amount of times because of its hilarious plot and awesome soundtrack, amongst other things.

On a side note, does FF8 count? The only thing "broken" was its Junction system, which made the game impossible if you didn't instantly work it out, then ridiculously easy once you did.