When battling the final Boss, try this strategy. When he rises slightly higher into the air, dash under him and use the Upward Slash technique, which requires the Fire Chip equipped and the "Tenshouzan" EX skill. Also, try using the Active Form, as it is the fastest form in the game. This lets you get in and out faster. This will do an excellent amount of damage, and is fairly safe if you know what you are doing.