I've got two words: Game gear.
I actually had one of these. I sold my NES to get it - and for like two years I was king of the playground. I used to do these 11 hour car trips to Manitoba across Saskatchewan (think sea of grain - for 11 flippin' hours) and Mortal Kombat saved my life. Then I stole my friend's SNES and never looked back. I defy anyone to beat the sheer homicidal urges after being caught by E. Honda's 10000 bitchslap technique.