Like the post title says, there will be spoilers for both Kirby and the Forgotten Land and Star Allies. If you care about that, play the game first and come back here to give your thoughts.
Anyway, I don’t have anything provable on the foreshadowing butterfly turned final boss. However, I have noticed that the theme that plays when fighting Morpho Knight in The Ultimate Choice mode in Star Allies Is Marx’s battle theme. Marx also seems to have a special place as the only dream friend to be a boss in the ending credits. Therefore, my theory is that Morpho Knight is a member of Kirby’s species that Marx corrupted into a bad guy. I know it sounds crazy but it does seem in character for the psychotic clown and stranger connections between games have been made.
Anyway, I don’t have anything provable on the foreshadowing butterfly turned final boss. However, I have noticed that the theme that plays when fighting Morpho Knight in The Ultimate Choice mode in Star Allies Is Marx’s battle theme. Marx also seems to have a special place as the only dream friend to be a boss in the ending credits. Therefore, my theory is that Morpho Knight is a member of Kirby’s species that Marx corrupted into a bad guy. I know it sounds crazy but it does seem in character for the psychotic clown and stranger connections between games have been made.