Question: is phlannel boxingday princess bubblegum?
Answer: The wiki “confirms” that Princess Bubblegum is Phlannel Boxingday in disguise. other reasons they list: Phlannel Boxingday's initials (PB), number of letters in his last name (8), and number of syllables in each word (2, 3), are all identical to Princess Bubblegum's.