Most of the plug and play systems released have had relatively average selections of games, so I was curious; what would you put in a plug and play system, and from what system?
Keeping in mind that they have to be cart based, and for the sake of simplicity limited to 6 games per controller. Ideally the games would be easy to pick up and play, so as good as it is, Herzog Zwei would not make a good game for a pnp controller

My ultimate Mega Drive plug and play controller:

Truxton- Easily among the best shmups on the system, and its a genre thats often overlooked on pnp systems.
Sonic 3- Mainly because I really hate the 3d bonus levels in sonic 2..
NBA Jam- Assuming any licensing issues could be worked out.
Gunstar Heroes- Because its gunstar heroes.
Streets Of Rage- Ill keep it simple and go with the original.
Rolling Thunder 2- Underrated classic.

Im rather curious to see what people would put in systems like the Master System, which hasnt had a pnp controller released yet..