How to help my brother get skinny.

Ok, so I have a 10 y.o baby brother who is 4'5" and weights 145 pounds.

He is obese. But I can't help him at all. I don't know how. I try taking him to the park to play tag with his peers..but usually he gets tired and plays beyblades or whatever with his friends. He is a complete couch potato and he loves video games and etc. I do try to workout with him by dancing..but he hates dancing so...i even tried to play sports..which he hates as well. Only thing he likes is when we wrestle..but I almost killed him once and he started to cry and yeah. He hates sweating or being out of breath and eating the right foods. He likes to eat meats and candy. If I give him a salad with no grilled chicken or roast beef he won't eat it. And he will starve until he eats want he wants. His doctor said we should force him and we have...we even told him the dangers..but he doesn't care. He isn't healthy and I am just lucky he doesn't have diseases yet. My mother told me he will grow out of it when his peers begin to call him fat. Which they already do...but he doesn't care. His diet isn't that horrible...but I'm worried about his exercise...most kids his age are highly active..he just eats and sleeps.
How to help my brother get skinny.
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