Paper Bowser Jr.

Paper Bowser Jr. is the paper incarnation of Bowser Jr. in the game Mario & Luigi: Paper Jam. He represents Bowser Jr. from the Paper Mario game Paper Mario: Sticker Star. Alongside various other paper characters, Paper Bowser Jr. came out of a book containing a whole paper world.

History
Paper Bowser Jr. makes his debut as a wholly unique character from Bowser Jr. in Mario & Luigi: Paper Jam. He first appears at Bowser's Castle, meeting the real Bowser Jr., but unlike the two Bowsers, Bowser Jr. and Paper Bowser Jr. quickly resolve their argument and become friends. Later, they are put on guard patrol watching Peach and Paper Peach, making sure they don't escape, they steal the book in an attempt to destroy it, and they get sent to the villa in Mount Brrr. After a Papercraft battle, they fight the trio in Bowser's Castle, but are defeated. Bowser and Paper Bowser come to yell at the two Bowser Jrs., but when they see that they can barely move or speak, the Bowsers, now very mad at the trio for their actions, pick them both up and take them away. Paper Bowser Jr. isn't seen again for the rest of the game, and presumably returned to the Paper Mario book along with the rest of the paper characters at the end of the game.