Chris Jones

Chris Jones is a scientist who is friends with Jack Bronkerson. He turned Jack into Bronku.

Trivia
Chris Jones is based upon the deviantART user "Jonesycat79." His real name is Chris, and his username is JONESycat79. Along with this, they both like transforming humans into other species.

Chris may have known Jack would change and might be evil or a villain who wanted to transform Jack on purpose. However, he is a confirmed hero, but this is still a likely theory.