KO Factory
My way of unlocking the special options menu and random stage selection menus, as well as trophies for thousands of KOs. Unfortunately, you can't use infinite time nor special melee (eg lightning mode) otherwise it won't count your KOs. This yields 24 KOs per minute, which at 99 minutes would give roughly 2415 KOs.
Make sure Lucario is facing to the LEFT and starts near the left side of the platform, otherwise the aura ball will get pushed too far away. For good measure, I held up on the wavebird that controlled the bowsers when I turned it on, so they would drop out from halo immediately. If you don't have conveyer belts, you unlock them by building five custom stages. You can change their widge by going to the size box to the right of the flip option, to the bottom right.