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Here's the Fakemon from the logo. It's a Bug/Psychic snail line. The idea is that the shell is its own living being, a parasite, if you will. The shell eventually overcomes the snail and takes control.
Bug > Bug > Bug/Psychic
I haven't come up with names and such, so feel free to help out. I'd imagine it'd be a defensive tank, with pretty good Special Attack, but poor Speed and Attack.