Spyke

Early Life
Evan Daniels was born in New York City, New York to an unnamed father and Vivian Daniels, and has lived there his whole life. His mutant abilities are first noticed at his high school basketball game by his Aunt Ororo, and his teammate Pietro Maximoff. Evan and Pietro had an ongoing rivalry since childhood that culminated when Pietro framed Evan for robbery. However, their feud was rarely mentioned after their introductory episode and never mentioned at all past the first season.

Powers and Abilities
Spyke's powers involve a self-replicating exoskeleton (though, it appears to be an endoskeleton instead, as the bones emerge from within his body) and rapid bone growth. He can extend, retract, and fire incredibly-dense bone spikes of any size from nearly any point on his body (from small, pencil-sized spikes to long spikes he can use in combat, like fighting sticks), usually from his arms and torso. His body instantaneously seals the wounds caused by projecting his bone spikes with no visible scarring, possibly indicating some sort of healing factor limited to just healing his bone projections and nothing else. His rapid bone growth gives him a strong craving for milk and calcium-rich substances to aid in the accelerated growth since using his powers decreases his calcium levels, which then need to be replenished.

In the later episodes, due to the ingesting of the sports drink Power8, which causes harm to those with mutant powers, Spyke's powers evolved even more. He gained the ability to heat up the ends of the spikes he produces, increasing their damage potential and allowing them to pierce and cut through steel. He also has protective plates and spurs that form around his upper body, granting him an almost-indestructible exoskeleton, which gives him superhuman endurance and enhanced strength. However, the accelerated mutation caused Spyke to be currently unable to retract the exoskeleton that his body produces. He can also now extend small spikes on his feet and hands to scale and stick to walls.

It is unknown if he requires milk and other calcium-rich substances in this state.

Following this increase in his mutant powers, he no longer used his skateboard, which he sometimes used in his earlier battles against his opponents.

Trivia

 * While it's said that Spyke's primary ability is a self-replicating exoskeleton, the fact that every time he uses his powers, the bones produced emerge from within his body, meaning that it should be a self-replicating endoskeleton instead of an exoskeleton. The exoskeleton comes after his mutation progresses.
 * A Q&A with Greg Johnson reveals that, despite rumors, Spyke was not written out of for being unpopular. Truthfully, he was well liked by the younger (and biggest portion) of the show's audience, with only the older viewers disliking his character. His hiatus was intended to give new aspects to his character with his joining the Morlocks and becoming a mutant-protector against hate-crime.
 * Spyke's powers are very similar to those of the character, Marrow, a pre-existing female Morlock in the X-comics.