Bunsen is a student at Whateley Academy in the Advanced Technologies program. Apparently he supplies the Dylans (the campus druggies) with designer drugs. He lives in Emerson.
In Absinthe 2: The Absinthe of Malice he supplies Absinthe with a jar of essence of strawberry. One of the pixies uses it on Centurion.
In Shenanigans Too he gives Monkeywrench a jar of cat pee.
He's described as both a biodevisor and as a major chemistry nerd.