Guru's House bonuses
Throughout the game, you will have to defend Guru's House from those seeking the Dragon Balls. The more defense missions you complete, the more Guru will reward you. Successfully complete the indicated number of missions to unlock the corresponding reward:
Extra Dragon Ball Wish Categories: Successfully complete 15 defense missions, then talk to Guru.
Unlock Hidden Potential (Stat Cap Raise): Successfully complete 5 defense missions, then talk to Guru.