Phineas & Ferb guest characters

Latest assignment was to make 3 characters that could fit into the world of Disney's Phineas & Ferb. We have to create a kid, an animal, and a guest villain. As not being an avid watcher of the show, this was something a little different for me haha. Anyway, here are my characters and some sketches from the show:

 

I just realized that Ms Bumblebore's arm (screen right) doesn't really attach to her shoulder....gonna have to fix that. *huff puff*