Everything came with a unique colorscheme, apart from the core grafx and Supergrafx, which share the same controller. The American pads and the Laseractive pad, and the Duo R/RX pads are the only ones I don't own, but I do have rather a few.
The only official pad (that I'm aware of) that didn't come with a system was the Avenue 3, bundled with Forgotton Worlds.
Like pokemon, you gotta catch 'em all.