Danne... I don't know how many Amatuer bouts you have had... How much regular real sparring you do or if your training Knowlodge comes from more than just reading threads on bodybuilding.com but most Amatuers fight best at their *shock* natural weight... because they are young and their bodies are unable to metabolise Nutrition and build muscle effeciently.

Tyson was always Naturally big, He got Muscular and conditioned from training... but his frame was always going to be about that size, he just had an edge put on it. Why do you think Boxers like Carlos Maussa (who is taller than Mike Tyson) fight at weights such as Welter weight?

Its because naturaly some people are naturally Slender, so usually uneeded bulk makes them perform baddly by putting to much strain on the Cardiovascular system and eating up Oxygen in amounts that their bodies where never ment to be able to supply if they want to be able to efficiently box...

You can only function within the limits that your energy systems and frame can be pushed to.

You can't tell me that every 6 foot guy who eats a good diet can put on large amount of weight and be as efficient in a ring than had they been lighter... its not that simple... every one is different...

Assuming Tyson had eaten an average Diet and done an Average amount of of exercise he would have still been a fucking giant, maybe not as strong and conditioned, but he would still be huge. if he hadn't trained he was never going to be a 6 foot tall skinny 11 foot man...

You have said that to gain weight you need to consume more calories than you use, this is true... but what do you mean by 'you won't add much fat' and 'if you do stop'? if he wants to gain weight he will have to gain some fat and then once he is over his target weight burn that off, you can't gain a lot of muscle with out carrying some extra fat whilst you do it... an increase in fat is not a definite sign to stop.

There has been some good advice here, a young amatuer boxing should fight in what ever weight division he fit into unless he is overweight, in which case he should burn it off and then worry about competing, I don't know what you think you know about boxing but why would being 15 pounds heavier than his natural weight (thats the weight he is at with out being on any high calorie/protien diets or taking any shitty suppliments) make him a better fighter? will he hit softer than people in his weight division? Will he have more energy and stamina? explain your answers? What do you know about boxing or lecturing people about 'real diets' before you went to bodybuilding.com all you did was ask about suppliments and fat burning tablets... tablets and suppliments ffs... not diet