Quote Originally Posted by pyoro-pyoro
which kind of sucks considered that you can't practice that with a computer and the training one only lets you practices it once
Actually, to my knowledge, you can practice it in training mode. Just set the computer player to attack you and you can practice it endlessly.

Also, bad endings don't come from being able to button mash or easily beat the boss(You might have been being sarcastic), they come from developers not spending enough time with the story or cg scenes.