Sir Arthur and Sir Buster is a three parted story about the day Arthur's life changed, the origin of Meta Knight's mask and why it keeps being cut in half, why Galacta Knight is in a crystal jail and Morpho Knight's past life as Buster, who was Arthur's friend, Galacta's student and the original wearer of the Meta Knight mask.
Part 1 - https://kirby.fandom.com/f/p/4400000000000066717
Part 2 - https://kirby.fandom.com/f/p/4400000000000066720
Part 3 Finale - https://kirby.fandom.com/f/p/4400000000000066734
Warning: y e s