User blog comment:Ramjet 12/sonic reffrences/similarities in across the second dimension/@comment-406459-20120713020843

There seems to be a lot of attempts on this Wiki and elsewhere to try to connect things that people are interested in just because they want to, and since it has a large fanbase on the Internet, Sonic the Hedgehog is one of the ones I see most often. In this case, this is definitely one of those stretches. Number 2 in particular is quite a stretch by any means of the imagination- "Doctor" is a common prefix in both reality and fiction. By that logic, both Dr. Doofenshmirtz and Dr. Robotnik also allude to Dr. Zhivago, Dr. Kildare, Dr. Scratchansniff, Dr. Doolittle, Dr. Evil, Dr. Octopus, Dr. Strangelove, Dr. Quinn Medicine Woman, Doctor Who, and countless other fictional doctors. For that matter, giant robots are also a common trope in fiction, Perry is more of a greenish teal as opposed to Sonic's regular blue, Perry is not known for running fast (the signature attribute of Sonic), etc.

Our page on allusions and similarities gives some good pieces of advice as to whether or not something is a direct allusion intended by the show or just a coincidental similarity. The items in particular that seem to stand out here are "If I list that Item A is an allusion to Item B, will other people see the connection between them?" (probably not), "Is there more than just Item A being similar to Item B?" (not really), "Is it just a coincidence that Item A happens to share something in common with Item B?" (Yes, yes it is), and perhaps most important of all, "Am I adding this allusion because I want there to be a connection between Phineas and Ferb and this other item?" (Most likely, but only you can answer this question yourself). If it looks like a platypus, growls like a platypus, and fights crime like a platypus, it's probably not a hedgehog.