Can you level up your KG if you are already max-rank? What if a new KG is released or something, but you are max-rank and cannot get its moves, lol.
I do not believe you can. That's why i never rank up unless i have a new KG to level.
once you hit max rank, you can still prestige to level up your kg, but you'll still hit max rank. you can keep on prestiging, nothing to worry about.
What do you think?