According to IMDB, Bart Mixon is one of the special makeup effects artists working on Dragonball. Mixon has worked on such films as The Terminator, T2, How The Grinch Stole Christmas, and Hellboy. As shown on Dragon Ball Movie Blog
------------------------------
Bart J. Mixon has created make up effects as a solo artist; under the banner of BART MIXON'S MONSTER FIXIN'S; and as a partner in the effects company, MIXON & ELLIS FX. Some of these projects would include:
MEN IN BLACK
RUSHMORE
STEPHEN KING'S IT
FRIGHT NIGHT PART TWO
PETER BENCHLEY'S THE BEAST
NECRONOMICON
DANGER ISLAND
NIGHT OF THE SCARECROW
As shown on BartMixon.com