BlasterTech takes on the appearance of a rabbit outfitted with a vacuum gun filled with rabbits. He wears full body protection clothing, including a helmet that doubles as a cap, with the grill at the front designed to resemble his teeth. He also appears to be wearing sports sneakers. His ears, tail and a bit of his chest are exposed through the uniform, revealing his fur color to be grey/black.
There is a red and blue variant of the character in the game files, suggesting that at some point there might have been a team dynamic. This has yet to be confirmed, and the current purpose behind the color schemes is unknown.
BlasterTech has the ability to fire balled up rabbits and giant exploding carrots from his vacuum gun. The gun can also be used to suck up objects and the rabbits, similar to Jet-Vac. BlasterTech can also emit a green barrier in front of themselves, a trait that is shared with all scrapped Skylanders in the game files. 
The unnamed character was based on the concept of dust bunnies, aglomerations of dust and debris that form grey clumps. Though the origin to calling them bunnies is unknown, they're called various other names such as dust mice in other languages.
According to artwork published by Dave E. Phillips, there were several working names for the character. One of these names is Jack Rabid, which is likely a play on the name of the characters Jazz Jackrabbit from his namesake series and the Rabbid's from Ubisoft's Raving Rabbid's series.
Another of the names is "Gust Bunny" which might have been a parody of Bugs Bunny from the Looney Tunes.