Achieving "best" status often involves grinding for weapons that reach the cap, typically found in high-rank battles or specific DLC dungeons.
: If you already have a save, back it up first, then replace it with the new one. Instructables Save Data Carry-Over Bonus If you have a save from the previous game, Danball Senki Boost , you can unlock the Danball Senki W as a "cleared save bonus". 100% clear file for a different region, or instructions for the Danball Senki Boost Save Game Files for PSP - GameFAQs danball senki w psp save data best