You need to use the FitMotionEtc.pacs for each one, that is your problem.
If it doesn't work when you put them with all of the other pacs/pcs files, then you are one of the unfortunate people who have to replace a part of Common1-5.pac (not sure which one they are in, because with my setup, I don't do that). Though if you look through those Commonx.pac files, you will find what you need to replace.
Bummer. Yeah, I have the FitMotionEtc files in the same folder with the textures. Works for Mewtwo. My computer's dead(I'm posting via Wii, and I have to use someone else's computer to move files around on my SDHC card), so I probably won't be able to take a look at the Common files for a while.
I tried Nanobuds' and Starwaffles Blastoise model, and it does seem to work better. No bobble-heading, but I did like the darker blue on yours better. Maybe one day they'll release a recolor pack, so I can have a Blastoise in each slot.