Born This Way Hank McCoy was a mutant from birth, instead of it manifesting when he reached puberty. I covered this a little in Early Years. When he joined the X-Men, as one of the original five, he was 5'-11" and 402 lbs. His mutation ended up with him being overly muscular with extra large feet and hands, dexterity of feet, highly agile, highly intelligent, very durable, can jump up to 32 feet, can run on all fours up to 40 mph for short sprints. Uncanny X-Men. Issue #5