The spell explicitly states "anything that would cause the body to change form (such as
shrink item) fails and ends the catatonia." So Ghost Brand, Shrink Item, Transfiguring Touch, Golden Guise, Warp Metal, and Dongun Shaper's Touch all do not work with it. To fit in a 1 foot cube, you are looking at tiny size creatures, so your Halfling would probably want a permanent Reduce Person, although I still have no idea why you would do this and there is an open question whether or not the Halfling would asphyxiate to death.
Incidentally,
Transfiguring Touch can be used as a money-printing spell with
False Focus (100 gp per casting), but so can
Bless Water (25gp per casting) if you use the
Magaambyan Arcana race trait to add it to your arcane spellcaster list.