List of Doofenshmirtz's backstories

Heinz Doofenshmirtz often tells back stories about his childhood to Perry.

Lawn Gnome Beach Party of Terror
The Doofenshmirtz family lived in Gimmelschtump, where their lawn gnome was repossessed. His father dressed Heinz up as a gnome and forced him to stand watch for hours at a time during the day and night, to protect their garden. Every time Heinz tried to move, whether it would be to grab a single Dunkelberry or wave at his neighbour, his father would always yell at him.

Raging Bully
At Heinz's birth, neither of his parents showed up. At five-year-old, Heinz threw his own birthday party at Gunthur's Goat Cheese's. His "closest friends" were there, two wolf puppets, Betty the pig, a rat and the lice twins Olga and Chicago Joe. A man wearing a goat costume walks up to the table and greets Heinz. He puts the Dunkelberry cake on the table and leaves. The restaurant manager then shouts out to Heinz "Hey kid, lock up when you're done, 'kay!". At night, Heinz runs home with the cake in hands, and gets attacked by the Dunkelberry bats, who like eating Dunkelberry cake.

Leave the Busting to Us!
When Heinz was younger, he performed magic tricks for the local kids. Heinz performed the pull-the-rabbit-out-of-the-hat trick, and instead of pulling out his rabbit companion, Bubba, he pulled out a skunk, which sprays him. Next, he performed the card trick. A girl volunteered to pick one of Heinz's cards, while he blindfolds himself. When Heinz uncovers his blindfold, he appears to be holding the same skunk, who sprays him again. Yet again, another trick goes wrong, and while Heinz shouts for someone to help him get out of some chains, the skunk comes along and sprays him once more.

Crack That Whip
In Crack That Whip, Doof tried to tell a back story, but his head was hurting so much that he couldn't tell it.