Heinz Doofenshmirtz's Father

Heinz Doofenshmirtz’s Father is the former father, and enemy of Heinz Doofenshmirtz who is extremely merciless, hateful, negative, disrespectful, and evil to him and disowned him by replacing him with Roger Doofenshmirtz as their new son. He respects Roger and was nice to him. He was once training Heinz to tough out and become a man, but failed and disowned him. He is also a satanist and was working for Viacom and was Heinz Doofenshmirtz’s antagonists

After the series ended
One day after the series finale of Phineas and Ferb in 2030 in the future. Heinz Doofenshmirtz’s mother and father watched the TV show Phineas and Ferb and saw that their most hated son Heinz used dangerous weapons at Roger and started to get mad and attempted to destroy Heinz, until a mutated and fused Phineas and Ferb ate them and Roger. The monster got destroyed and got turned into ooze that fused Heinz Doofenshmirtz’s anti-parents and Roger Doofenshmirtz into a fused mutant. Until Viacom captured them and planned to split them back to normal. Heinz’s anti-parents and Roger Doofenshmirtz joined forces with Viacom to destroy Heinz Doofenshmirtz. Until Viacom hired Grulinda and Boris that are against Heinz Doofenshmirtz and formed the Anti-Heinz Doofenshmirtz Squad. They planned to capture and destroy Heinz Doofenshmirtz with a Un-Exist-Inator until Heinz Doofenshmirtz killed him and squashed his face and zapped him with the Un-Exist-Inator