In Dragon Adventure mode, play until you get to the Majin Buu Saga. When you make it to the Two Majin Buus storyline, you will be playing as Fat Buu. During that story, go to the top right area of the map and go to the Mountain Road area. Once there, Yamcha will offer you a contest to see how long you can last. If you either stay alive long enough or if you are strong enough to defeat him, you will be awarded with not only 1,000,000 Zeni, but you will also get Equipment Slots +4 and the Fox Mask fusion capsule. Once done, go back to the scenario selection screen and repeat. Increase Fat Buu's attributes as much as possible to make this easier. It is recommended that you spend some time in the Android Saga scenario and choose the Goku Defeated!?! story. Then, go to the bottom of the map to the Southern Capital. When you are fighting, destroy the buildings to look for a Dragon Ball. Keep doing this until you find them all then summon Shenron and hope that he has the Kiss From #18 capsule. That will bring up your attributes very quickly.