Biped (character studio) doesn't have squash and stretch bones.
There is a solution with a script, but it is not ideal.
Couldn't we have the Biped bones with squash and stretch by default ?
It would be great for cartoon animations !
ps : the script
for obj in selection do
(
SubAnimControl = obj.transform.controller.Biped_SubAnim.controller
SubAnimControl.BipScaleList.controller.Available.controller = ScaleXYZ()
)