When the party of the first part will kindly re-read the aforementioned article on the the present participle, they may come to realize that the court's position is unchanged by their impassioned plea in this matter.

aforementioned has syllables.

The aforementioned celebrity then left the scene.

Aforementioned Productions was created in 2005.

Yes. Aforementioned is an adjective defined as "denoting a thing or person previously mentioned. Example: In the aforementioned question, I was asked if I could put the word "aforementioned" in a sentence.