 The prototype Phineas was ruder to others than the version in the eventual show, where the creators decided to make him more good-natured.Citing comedy's "big duos" including Wallace and Gromit and Jay and Silent Bob, the creators chose to give Phineas most of the dialogue while Ferb remains almost silent.All characters in "Phineas and Ferb" were drawn in a design borrowed from Tex Avery's style, with geometric shapes being included in their structure; Phineas in particular is that of a triangle.