"After some news involving him due to a footage, he hid himself while trying to escape from them. As he got out, he wonders if his different plan will go well later on." This is a different fight project. This means you can remix any remix by a different person. Which means you can team up against makai. Your choice affects kirby makai in the end of the fight, you can either spare, or slay him. After the choice has been made, the fight project will be closed, and will affect kirby makai's character in later projects and remixes. He's very powerful, due to the enemies from just attacking them, so i do apologize if it seem a little overpowered. TL;dr: You and anyone teaming up have one shot to change him after the dark matter has been defeated.
(shrugs) This Kirby is pretty powerful... I hope it'll be a good fight for you. (... also, I need to use him again...)