Prince Gumball’s path to the throne was brutal. Fionna wasn’t around during the Sugar Wars; Gumball distracts her by acting super bland and wearing disco pants.
Marshall Lee knows the truth, but as Chaotic Neutral, he just can’t bring himself to give a shit.
If I was a famous author I would publish a book with ten different endings which all went to print with varying degrees of rarity, but not tell the fans about it so that I could watch their confusion as they disagree over how the story ended. Then when they figured it out I would ‘come clean’, telling them that I had released eleven alternate endings and watch them panic again as they all try to find the last ending.
This is perfect.