In DBZ Online, one of the fastest way to get EXP is through the Fight of Dragon Ball Feature. Besides huge amount of Exp, Fight of Dragon Ball also gives you Accessories which you can equip for huge stat boost.
Inside the Fight of Dragon Balls, you will fight against 6 opponent teams in row. Don't worry, your team also joins you in the fights. You also can bring along 2 of your friends to join the fight!!
To start the fight of Dragon Balls, you need to choose the which dungeon you want to clear. Each dungeon have their own level requirement and reward, so double check it before you enter. Dungeons also have 2 difficulties, Normal and Hard. Hard mode will be opened once you defeat Normal mode.
Once you done selecting the dungeon and its difficulty, you need to create your team. Once the battle starts, each of member of your party will take on 2 (or 3 if you only bring 1 friend) opponents.
Your friend is busy or can't online at the same time? Don't worry. As long they set their 'clone', you can invite them even if they're not online. But these clone can be used only once every 1 hour... sooooo... it's better if you go together with your friend (or solo the dungeon. If you can, that is).
Oh but don't forget, their Main Character level must be within the dungeon level. The lowest level requirement is Lv 40 and new dungeon will open at Lv 60 then Lv 80 (every 20 Lv).
Once you complete the dungeon, you will get Exp, Silvers, Various Items, Accessory Materials and of course an Accessory itself.