Or whatever it's called.Every enemy thre you defeat takes up to 800-600 experience points.It's the forest in Mars Village.Go to where you fight the boss in the forest(you will need to be like level 18 or higher)make sure you're healed and you will beat him up easily.Get some strong weapons first in that weapon shop.
When you have completed over 45% of the voice collection a phrase will appear on the button in the right corner of the screen. Press this button to restart the game and new difficulty levels including 'Universal' will be selectable. In the 'Universal' level Monsters will have double the HP and attack power.
This isnt really a cheat more of a hint when ur on the secound disc go 2 fun city and u gota be pretty strong but if u r u can enter tournment "A" and u gota have at least sword bomber for an r1 attack.
U can fight the last guy the dragon thing and he'll give u 75'000 experience points and when ur hurt u can go into the room next to the host, that lets u in the tournement and talk 2 one of those guys and he'll heal u...