Ventriloquism Doll is a gadget of Doraemon's that allows the user to be "better" at talking.
A quite opposite to ventriloquism, the doll will talk like the user and trick the listener(s)'s into believing what the doll said. However, should the gadget be stopped, the listener will immediately come back to sense.
Doraemon brought out this gadget because Nobita wanted to be better at talking like Suneo.
Note: All of these were stopped by the end of the episode.
- Made Tamako believe that she should pull out the grass by herself.
- Made Tamako believe that New Year Money should be given more than once per year.
- Made Teacher believe that Nobita get low score on test for everyone.
- Made Gian stop his concert.