Doodle Pun

Doodle Pun comes from a game by PunMaster2016 called "The Scratch Event (Floor 1 Demo)" and is the character you play as.

Mechanic
He'll be in Cam06 selling power in order to get enough PunCoins to buy some items for his quest! The higher his difficulty, the more expensive his prices are. Buying power will also reset Flushed Pun's power usage.

Origin
Doodle Pun comes from a Binding of Isaac fangame called the "The Scratch Event". He is based off the drawing of Isaac in the intro of Binding of Isaac. As of now, the game is only a demo and doesn't have much do it, but in the future, it is planned to have more things ready. It also seems to show PainMaster as an item you can use.