Phineas relies on Ferb to handle a lot of the more technical aspects of Big Ideas such as wiring and welding, while lending support where he can. He values Ferb's intelligence and thinks highly of his skills; shown in "Ready for the Bettys " when he assumes Ferb built Perry's underground headquarters and Doofenshmirtz's lab. Phineas usually recieves credit for the inventions; for instance, when Isabella found out that Phineas and Ferb were The Beak , she gave Phineas most of the credit, even though Ferb controlled all the weapons and gadgets ("The Beak"). Despite this, Phineas primarily names inventions after Ferb or both of them, giving his brother as much credit as possible and occasionally redirecting praise to him.