Princess Bubblegum´s Trivia

On the Cartoon Network official website, Jake referred to her as "a horrible mutant mix of bubblegum and human DNA." When he brought up Finn's crush on her, Finn replied, "It's just 'cause of the radiation."

Princess Bubblegum is an avid trumpet player

Unlike most of the other princesses (Wildberry Princess, Slime Princess, Lumpy Space Princess, etc.) whose qualities precede their titles, Princess Bubblegum's name is the opposite.

Her original name was Bettie, but Pendleton Ward changed it to Bonnibel because Bettie is his mother's name.

Princess Bubblegum loves pink

She loves spaghetti

 Princess Bubblegum wears earrings but does not appear to have ears. However, in "All the Little People," little Princess Bubblegum is shown with ears.

Marceline is the only person known to call her by her first name, Bonnibel, or Bonnie for short.

Princess Bubblegum seems to be the most active in dealing with royal affairs, as she is seen managing the potluck for princesses in "Princess Potluck."

In the animated short, the gem in her crown is magenta, but in the series it is turquoise.

In "Video Makers" and "Mortal Folly," she consumes other Candy People. According to Adam Muto, this is to replace lost candy biomass

In the episode "Susan Strong," there is a portrait of Princess Bubblegum and an old woman in the top left corner of her room.

She makes a cameo in "Hug Wolf" in the background of the Candy Kingdom chasing after a black or dark gray cat. She was wearing the same clothes as in "The Real You."

In the episode "Puhoy," Finn named his and Roselinen's daughter after her (Bonnie).

In the German dub of Adventure Time, Princess Bubblegum speaks German and Turkish.

Princess Bubblegum has a very fast bird called Morrow, which she often uses as a form of transportation

Princess Bubblegum knows hand-to-hand combat

Her NPC in the game, FusionFall, appears to be more "human-like."

She can change her age at will by adding and removing candy biomass.

Besides English, she also speaks German

PB has a go-kart in the Cartoon network app "Formula C Cartoon," which is purchasable with the adventure time pack along with 7 other tracks and karts of Gunter, Ice king, and Jake.

She states in "Earth & Water" that she likes the taste of envelopes. However, this may have just been to distract the guards.

Princess Bubblegum seems to wear glasses whenever she stays up for long periods of time

In the video game Adventure Time: Explore the Dungeon Because I DON’T KNOW!, Princess Bubblegum said she was 827 years old.

In the game, which was co-written by Pendleton Ward, Princess Bubblegum explains that she was part of the sentient pink goo that was formed about one thousand years ago, and achieved sentience upon being spat out, with her current form being 827 years old. It is unclear how much of this story is canon to the cartoon show. The remainder of the pink goo (Princess Bubblegum's "parents") is locked in the lowest level of the Candy Kingdom's dungeon until it is destroyed as a final boss and floats out in various sentient bubble forms during the closing credits.

She can apparently adjust the length of her hair manually, as she cuts her hair short in "Wizards Only, Fools" as part of her disguise, but her hair is back to its usual length after they return from Wizard City.

According to Cartoon Network Latin America, PB has the wish to win the Nobel Chemistry Prize and she gets mad when someone does not follow her orders.