FAKERS, FREAKS, and CHARLATAINS
Things that look like established game systems but aren't.
BBK VCD
VCD player that looks like a PS1

VCD player out of the far east that uses the PS1 shell. Sadly this unit does not play any games.
BLOCKZONE

These are those little units that play those crappy blocky games. There seem to be upteen billion variations of these things. This particular unit looks like a little mini PS1, so that's why I included it here.
CASSETTE BOY

Looks like a rare Game Boy variant? No, it's a walkman.
GAME CHILD

Looks like a GameBoy? No, it's a Game Child, a little handheld that has it's own (crappy) interchangeable LCD games ala the Tiger R-zone. About 5-7 games exist for this thing, mostly released in Europe.
IMAGIN INTERORAL CAMERA

The Jaguar reborn... as a piece of dental equipment. Look closely at this thing, it's the Jaguar case on it's end. Imagin bought the molds to the Jaguar from Atari and made this dental camera. It even has a "cartridge." I need to go to the dentist. I have a cavity so big I can feel it.
M GAGE

Leave it to the Chinese to quickly make a buck. Ladies and Gentlemen, I present to you the "M Gage," or better known as one of those crappy blockzone game things that seem to be plaguing the world lately inside an N Gage case. Will these things ever end?