Corrected entry: When Shendu has the first 11 1/2 talismans, he can't transform into his full dragon self yet, even though he has the Rat. But later on when he fights Jackie and looses the Rat, he suddenly reverts back to a statue.
Piemanmoo
16th Nov 2004
Correction: He needs all twelve talismans to transform into the dragon, but he only needs the Rat to stay that way.