What is a healthy weight for a 13 year old boy? he is 5' 8" and currently 156.2lbs. also, can you please give me a very detailed diet for him.

97%ile: He's in the 97th percentile. That means that 97% of boys the same age are shorter and lighter that he is. A good diet includes all the typical food groups: meats, fish, dairy, vegetables, fruits, complex carbs, avoidance of "junk" food. From his measurements he seems a vey healthy kid.

Healthy weight: You can check norms for height/ weight using growth charts. See: https://www.cdc.gov/growthcharts/index.htm. Can't give you a detailed diet in 400 characters or less.