A token copy of Sprouting Phytohydra is created even if the damage dealt to Sprouting Phytohydra destroys it.

If a token copy of Sprouting Phytohydra is dealt damage, it will create another token copy.

If Cytoshape turns a creature into a copy of Sprouting Phytohydra, and that creature is dealt damage, the token that is put onto the battlefield is simply a copy of Sprouting Phytohydra. At the end of the turn, the Cytoshaped creature will revert back to what it was, but the token copying it will not.