Jekyll Doofenshmirtz

Jekyll Doofenshmirtz is Heinz Doofenshmirtz's great great grandfather who created a machine to turn someone into either a fairy princess or monster.When he finaly got the angry mob to his house he drank the concoction he tuned into a fairy princess.He upsets the platypus monster, and goes to fight him but accidently turns himself into a fairy princess.He then isseen in the shot of him being eaten by the Platypus Monster (The Monster of Phineas-n-Ferbenstein)