A 33-yr-old retard, huh?Well, since it's glaringly obvious to everyone but you that there is NO video input on your portable DVD player but yet you insist on trying to find out how to connect something that cannot be connected are you entirely certain that it is us who are the 'Tards?
Just in case you missed that let me see if I can make it painfully simple for you:
In the most simple terms possible ~ there is no magic cord that will solve your problem. You can purchase an adapter that will convert the audio RCA outputs from your Xbox to a 1/8" stereo miniplug (the headphone-type jack) and you would be able to listen to your games on the DVD player - but there isn't a method of inputting the video signal so you won't be able to see it.
Get it?
Got it.
Good.