Gain 255 Senzu Beans
Senzu Beans are useful items that fully restore a character's health and energy. It is normally only possible to get a total of three Senzu Beans in "Dragon Ball Z: Buu's Fury." It is possible to get 255 Senzu Beans through a glitch. Gohan will ask Goku to bring him a Senzu Bean from Yajirobe at Korin's Tower during the World Tournament. Go to the tower and get the bean from Yajirobe. Use the Senzu Bean from your inventory before going back to Gohan. You will still give a Senzu Bean to Gohan when you talk to him, but you will also now have 255 Senzu Beans in your inventory.
Duplicate Equipment
You can use a glitch in "Dragon Ball Z: Buu's Fury" to duplicate equipment. Equip Goku or Vegeta with equipment you wish to duplicate. Use the Fusion Dance skill to create Gogeta. Unequip the character you wanted to duplicate from the original character. Gogeta will have an extra set of equipment in addition to the set of equipment you removed from Goku or Vegeta. This same cheat can be used with Goten and Trunks using Fusion Dance to form Gotenks.
Level Up Weaker Characters
Characters become stronger by earning experience points from defeated foes. Weaker characters have more difficulty defeating enemies than stronger characters. A cheat in "Dragon Ball Z: Buu's Fury" can be used to give experience points earned by stronger characters to weaker characters. Attack an enemy with one of your stronger characters, but do not kill it yet. Run to any save point, making sure the enemy follows you. Kill the enemy while standing on the save point. The save point menu will appear as soon as the enemy is defeated. Choose "Switch Character" and pick the weaker character you want to level. The character you switch to will earn the experience points rather than the stronger character that killed the enemy.