Lol to further that...I'm 6 feet tall and 165 pounds and skinny

buy a bike and start riding it. or do some swimming. do jumping jacks as fast as you can for 1min and rest for 10sec, and then repeat.

I'm 5'11 and 178 pounds. i could gain more if I'm serious about body building but i'm not lol. Also I been training a lot in Karate classes in Goju Do. Best thing I've done in a while.

you are 15 and growing, be very careful restricting your food intake.  just try avoiding some of the more unhealthy foods. 

snacking in between meals on junk food is a big cause for a lot of unhealthiness in younger people.  a couple examples of good snacks are fruits and nuts.  If you are feeling especially hungry between a meal, you could try a can of soup, they are mostly low in calories and very filling. 

keep in mind, that eating healthy and appropriately is the most important thing you should be thinking about when looking at your diet.  some other things i would recommend are not skipping meals (especially breakfast), getting at least 8 hours of sleep, and a multivitamin(the local grocery store or pharmacy should have some recommended for teens)

For exercising just keep it simple: push-ups, pull-ups, sit-ups, and plenty of walking/bike riding/sports.

Here is a weekly workout plan, if schedules help you:

Workout Plan

There are videos on the site to help with proper form, if you are unsure how do to them.

Snake is that you?

Fitness/Jogging is the only way.Try to do them at least 3 times a week,and you should be fine in a matter of months.Losing fat is hard,but it can be DONE!You just need to get of that couch,you lazy bastard :P

Actually I can tell you aren't Snake, not just from the avatar. But I was hoping, we miss him.

Well I am a rarity. I'm on medication that causes severe weight gain. I started a diet for two months only eating fruit and vegetables fish and chicken. I cut off the fat and skin and drank pretty much only water or vitamin water. I worked out at the gym for an hour to two a day.

And guess what after two months of pushing myself and eating right. I lost a single dang pound. I went to my doctor and he told me to keep it up and after a year I could loose 12-pounds. I pretty much said F-U and returned to my unhealthy life style.

I beg my doctor to put me on something else, but he tried in the past and the other pills just don't work. I gained almost  100 pounds in one year.

On the plus side while I was dieting and excersizing I didn't gain any weight. On the negative I didn't loose any either. I'm 270 and only 22! My doc says I gave up too quickly but my dad who did the same diet and excersize I did, but cheated with one food item a day. He lost 15-pounds in one month and stopped for the second month while I worked my but off and lost a single louzy pound.

SERIOUSLY

Listen to this guy

The most important part is this method will help make it "sustainable"....you won't "bounce back".

Seriously don't chew gum on an empty stomach, it can give you ulcers.