Why would you want to?
"From Forbidden Arcana:
FLESH SCULPTER
10 KARMA PER LEVEL
(MAXIMUM 3)
Minimum Requirements: Spellcasting 4 (with
Manipulation Spells specialization), Zoology 5,
and Spell: Shapechange or (Critter) Form
A character with this quality is able to turn
themselves and others into a larger range of animal forms with the Shapechange or (Critter) Form
spells. For each level of this quality, a Flesh Sculpter
can transform a voluntary subject into an animal
form with a base body that is two points greater or
lower than normally allowed by these spells.
I'm thinking an Adept with Shapechange as an Adept Spell, a high body character that is basically beast boy.
I was trying to find a way to do it without being a MysAd.