After you get the Ukelele Charm near the Computer Room in Hollow Bastion, go to any Underworld Coliseum Match and Summon Stitch. The second you do, wait for Ohana to appear in the Limit space. Use it, and use the square button command four times. Then, while there is still time, use the TRIANGLE command. After it's over, you will have time to use it again. When you are done, you will see you have a lot of points, but no monster is dead.

You might think it's useless, but if you want to see the Secret Ending in Normal Mode, then you'll almost need this trick for some of the matches to complete the insane amount of points you need to complete the Olympus Coliseum part of Jiminy's Journal.