What's the best way for a teen guy to get a 6 pack?!

Crunches, and side bends, and add in a bunch of deep squats. Watch out for too many carbohydrates in the diet, and put in a bit of onion and garlic. That should help things along well into the process.

Life.

something called a throw down, you need someone to help you though and a flat surface about 4-5ft off the ground..
Its a excercise they used to get the desired look for there abs in 300....

Basically you lye face up on a flat surface with you legs hanging over the edge (so the surface ends at the base of your back, your freind then holds your legs (which should be together) by base and pushs them down as fast and as hard as possible, you then try and stop your legs from hitting the floor and move them back to a flat posisiton as fast as possible to which you freind throws them back down, do it for five min and your get what it does (IT HURTS, but it works a treat)

Also you could do something called a plack, lye face down flat on the floor hold your hands together behind you back. then raise and lower or legs and upper chest at the same time (as high as you can but both together at the same time), after two min you shouldnt be able to do much more

gym

Just do a lot of curl-ups. Your six packs are hidden in your skin and bones you just gotta bring them out by exercising your abdomen

Get the p90x ab ripper X video.

sex with my uncle.