Authors Note: This is how I assume my OC Nathan Seville has been altered in the story of "Ultimate A" by author MetalMunk15.
Disclaimer: Alvin and the Chipmunks belongs to Ross B. and Fox Studios, the story of "Ultimate A" belongs to MetalMunk15, and Nathan Seville belongs to me.
The Science of "Ultimate A": Nathan Seville.
Obviously, Nathan isn't a chipmunk, but rather a type of megabat known as a Flying Fox, originally from the island of Madagascar. Like most bats of any verity, Nathan can fly relatively well. Now since there's no reason to continue on the natural traits of this bat, let's jump ahead to how he has been enhanced.
Now, going by the information available in Chapter 15 of "Ultimate A" along with what info was present in the story "The Ultimate Battle" it is safe to assume that Peter did some experimenting on the giant bat too. The most astonishing feature being his claws, in that they are as strong as titanium, indicated by how Nathan was able to leave claw marks in the side of a tree.
Also to be noted is how Nathan was able to make himself appear as a rock, his wing membranes having been altered to act like the camouflage of a chameleon. A side effect or extension of this camouflage is how he can project images on his wing membranes, as seen when he projected the images of Brittany and Alvin's mother on them during the battle.
An obvious trait that Nathan was given was enhanced strength, allowing him to fly faster than normal, and also allowing him to create powerful gusts of air strong enough to send certain objects flying away from him. Also to be noted is that, although basic bone structure hasn't been altered, Nathan's skeleton has been altered in composition, making them double the strength of a normal bat's skeletal structure. This explains how he was able to block Alvin's fist with his hand, without the force of the punch breaking his bones.
It is unknown whether or not Nathan received any other enhancements, but one thing was for sure, and that's the fact that Alvin "Wasn't the only one being made into an assassin."
Well, there you have it, I know this was really short, but that's because of how little was changed with my OC. I plan to update with the other characters as soon as I get their separate bios and abilities. So if anyone can provide the bios of their respective OCs for me to continue this with, then please leave them in a review or PM them to me. Again I hope you liked this, and tell me what you think.