Perhaps my most played Kirby game of all time, this game is basically a coop boss rush of sorts that teams up to four Kirby players with different abilities to take on said bosses. You can level up the different classes of Kirby characters and get different weapons and suit upgrades that will help you with harder boss battles.

This is a free to play game that deals with this mechanic fairly well in the sense that you can get a decent amount of playtime before really having to consider start paying. Paying will allow you to have more apples which you can then use to faster upgrade your weapons and items saving you time. Since I was having a ton of fun with the game I decided to pay the highest tier to get all the apples and don't really regret it considering I put over 30 hours of gameplay time so it was well worth it.