On mobile, "extra quality" typically means you’re downloading an unlocked, modded version that bypasses in-app purchases and enables maximum graphics settings normally reserved for flagship devices.
Unlike simple fighting games, DBZ: Kakarot offers a complete RPG experience. You aren't just fighting; you are living in the world of Dragon Ball.
Go to your file manager and locate the DBZ_Kakarot_Extra_Quality.apk file.
You must own the game on Switch and dump the files yourself.