Everything about this guy's life seems to be pretty terrible. He had trouble digesting food and was always sickly as a child, plus he had to endure stomach pains. When he was one day told it was cancer, he left his village to not be a burden to his parents and to go wander away and die. He encountered Magneto who help him discover his inner maggot, literally. They returned to his village and found out his Father was killed by rebels. Magneto promptly killed them all. Needless to say Maggott didn't join Magneto's gang.
Later in life Maggott sought Magneto out anyway to get help with controlling his powers. Apparently it hurt immensely every time his slugs entered and exited his belly which they seemed to do up to 5 times a day. He ended up with the X-Men but never really bonded with them because of his consumption habits. He was young and was therefore encouraged to join the younger X-team, Generation X.
His adventures were weird at best and not worthy of mention at worst. Tragically he was captured by Weapon X and killed at their mutant concentration camp called Neverland. He gave his slugs to a couple of children in the camp before he died but now they appear to be in the hands of X-Men villain, Mr. Sinister.
There's not much redeemable to say about this character other than the fact that he was a good guy and had a good heart. He really got the bad end of the mutant stick though and a sucky life to boot. I couple of things I forgot to mention were that his digestive system was intelligent and they gave him the power of Psychometric Recall which allowed him to see past events of areas they fed. A lot of good it did him. He did however live long enough to earn an action figure of his likeness.