Alphonse Perrier du von Scheck is a fictional character from the Hey Arnold! universe.He is the German American CEO of Future Tech Industries, a corporation that bought up and attempted to tear down Arnold's neighborhood.
He is direct descendant of Archibald Von Scheck, British colonial governor of Hillwood area during the Tomato Incident. Nick Vermicelli directly answers to him. It is likely that Archibald Von Scheck was a Hessian.
He also places a huge screen called the "Scheckivision" counting down the days till demolition. He keeps a document that declares it a landmark hide in filing cabinet.
When Arnold and Gerald confront Scheck of having the document that declares the neighborhood a landmark he denies having it and kicks the boys out of his office. The boys soon realize Scheck is lying and eventually manage to steal the key to the cabinet from Nick Vermicelli. When Vermicelli notices the key is gone, he alerts Scheck. Arnold and Gerald infiltrate FTi and locate the vault, only to find the document missing.
Scheck appears from behind them with the document in his hand. He reveals that his ancestor, the leader of the British forces, was humiliated by the Tomato Incident, and that for years, Scheck has been planning to avenge his family by tearing down Arnold's neighborhood and replacing it with a hulking building carrying the Scheck name.
He then burns the document to ensure that his plans will proceed, before summoning his guards to get rid of Arnold and Gerald. They manage to get away, and are sure that they have failed, until Deep Voice (later revealed to be Helga) convinces Arnold to obtain FTI security-camera footage of Scheck burning the document, which Arnold does.
When Scheck sees the kids escaping with the footage of him burning the document and boarding Bus #13, he roars with rage and phones Nick to stop the children before taking the chase. Scheck orders Nick to blow the overpass but the bus manages to jump the hole. Arnold eventually shows the workers & residence the footage. Mayor Dixie declares it national to everyone's delight. Just then, Scheck arrives in his car demanding his workers to demolish the neighborhood, but they refuse, angrily pointing to the evidence on the screen.
The angry crowd then march at him, forcing Scheck to reenter his car. When Scheck sees Arnold and Gerald right in front of him, he tries to mow them down, only to discover that Arnold's Grandma Gertie has stripped his car of its tires. Scheck is then arrested for his crimes.