Some progress photos of what I've been doing for the last couple of days, now that I'm not as can't-get-out-of-bed-and-think-I-might-be-hacking-up-a-lung sick:
Toby the Toe-Biter took care of him easily. Maybe it was the magnets in the Raichu's feet, or the stuffing pumping through his veins... but it was more likely the lack of a good head on his shoulders.
He tries the body on for size, but a raptor head looks a little awkward on a Raichu's body.
He really digs the ears, though.
I'm actually a little farther along than the pictures show- I'm working on the end of the tail, and I've got the ears attached to the head, now. I need to get a couple more magnets for his tail so it'll attach to his feet for impromptu surfing.