Here are more Genesis "plug n' play" type machines. These are by "At Games" & are exclusive to Sam's Club stores. Sam's is a wholesale type club where you buy yearly membership to get discounts on food/home goods & family size stuff.

At left is the portable game player. It plays Genesis (not GameGear) games. It has 80 games built in because both of these are technically like a type of emulator but with hardware. The other is the 'classic game console deluxe' & it has 92 games, but also apparently, a cartridge slot. Look at how heavily they feature Sonic & his games on the packaging. They make it look like most of both line-ups are all Sonic stuff. This is interesting to see because the makers believe Sonic & his games are what was best from the system/what were most likely to make sales for them. Both are 38.98 at Sam's Club in 2013.