|The following information is from the Adventure Time comic book series. It may not be part of the same canon or continuity as the animated series.|
Issue 24 of the Adventure Time comics.
"Princess Bubblegum faces the consequences of her science experiment gone wrong as she finally finds a way to save the day! But is it too late? Find out if Princess Bubblegum is able to right all her wrongs or if her friends will never be themselves again, it’s a crazy conclusion to this arc!"
Princess Bubblegum and Marceline show up at Castle Lemongrab asking Lemongrab why hasn't he been taken over by the Gum. He screams that he is better than the Gum and that sweet and sour are natural enemies. Lemongrab's loud and obnoxious personality annoys Marceline, and the two nearly come to blows until Princess Bubblegum calms the situation with a tea party. Deciding to test Lemongrab theory on sweet and sour, Marceline and Princess Bubblegum go grab Jake from the Gum and throw him into Lemongrab. Lemon juice squirts out of his head and soaks onto the Gum, and it recedes, curing Jake.
Lemongrab remarks that none of the Lemon Kids have juices because of "reasons." Princess Bubblegum deduces that Lemongrab has only has enough juice left to give a drop to everyone, meaning they will need to some introduce the juice directly to the gum stuck in everyone's brains. But before Princess Bubblegum can enact her plan of giving impromptu brain surgery to everyone in the Candy Kingdom, Jake comes up with another plan.
Soaked in lemon juice and using his stretchy powers, Jake envelopes Lemongrab and covers the entire Gum affected area. He then has Lemongrab squeeze out the rest of his juice and uses his powers to insert himself into everyone's head to apply the drop to the gum on their brains, freeing everyone.
Later, Bubblegum continues her story, explaining that the Gum had a desire to hug everyone around it and had apparently learned mind control at some point. After the Gum experiment failed, she repeated the experiment, except that time she greatly reduced the sweetness, resulting in Lemongrab. As for the Gum, she receded back to where she was before, a nearly bottomless hole marked "Gum Kingdom" until she learns boundaries. Princess Bubblegum jests that despite all her preparations, her kingdom still needed to be saved by a boy and his dog as her gentle chuckle turns into crazed laughter.
Back up story
A Day In the Life of a Bun
- Princess Bubblegum
- Earl of Lemongrab
- Cinnamon Bun
- Peppermint Butler
- Banana Guard
- Candy People
- Lemongrab 2 (mentioned)
- Lemon People (mentioned)
- Like Adventure Time: Candy Capers Issue 4, this issue takes place between "Another Five More Short Graybles" and "Too Old."