"Does anyone else find it weird that we were saved by an anthropomorphic platypus?"
Perry the Platypus, also called Agent P by Major Monogram, is the 1914 Platypus agent of the Secret Order of the Knights Without a Cool Acronym (SOKWCA). Though he normally wore a fedora, he wore a fez at one point because his superior thought they were in Egypt. He was the nemesis of 1914's Doofenshmirtz. ("Phineas and Ferb and the Temple of Juatchadoon")
Agent P is almost the exact copy of the modern day version, the only visible difference being that he wears a fez (over his fedora).
This Perry seems to have most of the same aspects as the modern day version, with an additional flair for the dramatic and entertainment. This is seen from the fact that he brought backup dancers to a long-lost temple. He also seems loyal enough to wear a fez even though he wasn't in Egypt.
Judging from Doofenshmirtz's reaction to Perry's arrival, it would appear that they had at least one interaction before the events of "Phineas and Ferb and the Temple of Juatchadoon".
Ohio and Rhode Island had not encountered the platypus prior to the events of the episode. Ohio thought that it was weird how they were saved by an anthropomorphic platypus, but both were grateful for the aid.
At some point he joined the Secret Order of the Knights Without a Cool Acronym (SOKWCA) and had a run in with Doofenshmirtz.
- Phineas referred to him as an Anthropomorphic Platypus, however the platypus was not a proven animal during that time period.
- He seems to have a flair for the dramatic, judging from his bringing dancers to the Temple of Juatchadoon.
- "Phineas and Ferb and the Temple of Juatchadoon" (First appearance)