Playable Characters
Donkey Kong represents the DK Bongos peripheral.
Wii Fit Trainer represents the Wii Balance Board peripheral.
Duck Hunt represents the NES Zapper peripheral.
R.O.B. represents itself.
Mr. Game & Watch represents the Game & Watch product line.
Assist Trophies and Items
Color TV Game 15 represents the Color TV Game product line.
Super Scope represents itself.
Ummm... I guess Diskun could represent Famicom Computer Disk System and maybe Family BASIC...?
I was thinking that we might be running out of noteworthy Nintendo hardware... maybe Sakurai could venture beyond gaming and look through Nintendo's non-gaming products such as toys and the media... Captain N from the Captain N: The Game Master cartoon and Nester from the Nintendo Power magazine (I already know about Pilotwings 64 and Nester's Funky Bowling) could work as playable characters. Well-known Nintendo toys such as Ultra Hand and Ultra Machine could work as items.
We could have a stage that represents the SNES Mouse peripheral and it's called "Mario Paint". We could have a stage based on the
N&B Block series. That would be amazing!