i have some mod suggestions even tho this might be late. when you defeat king slime bulma ( as an npc) will spawn and she will give you space ships for 2 or 3 gold, the planet options should be simple like namek, the kais, and brolys planet and more. speaking of namek it should also be destroyed after a fight there with frieza ( if you do add bosses) and you can train with north kai to increase the mastry of the players super saiyan form that isnt maxed. i also think that going to other universes and meeting the charachers in that specific universes and each universe should be unlocked at a certain point like in hard mode. i also think you should add the z fighters and you can buy their signiture moves from them since all charachters know each others moves, and you can train with them like all enimies spawns are disables and when you finish training with them it will increase the mastery a bit. and lastly when you gather the dragon balls and make a wish shenron should apear and it will only be dont in a open space since hes so big and the otehr dragon balls should also be an option like the namek ones or the super shenron ones