Vincent Van Gook
From the Super Mario Wiki
Vincent Van Gook is a con-artist who poses as a knowledgeable and talented artist. He speaks with a French accent when he is acting as an artist, though he speaks with a Brooklyn accent when his con is revealed. His name and appearance are based off of the real-life artist Vincent van Gogh.
In The Super Mario Bros. Super Show! live-action segment "The Painting", Vincent calls Luigi to tell him that he won the art competition with his drawing of the Tippy Turtle (claiming that his Tippy Turtle was "the best ever"), and that he's coming over to act as an instructor to Luigi. Once Vincent arrives, he sets up an easel and canvas and lays down some of the basic rules of artistry, including always carrying a sharpened pencil and never going swimming right after eating. Mario, distracted by Vincent, drops a plate of spaghetti on the floor. Vincent immediately declares the pasta on the floor as a masterpiece and declares Mario an artist. Soon, they're discussing art with each other and Vicent tells Mario to teach Luigi instead of himself. While Luigi, annoyed, goes to read the newspaper, he tells Mario that his services as a teacher will cost $1500 for a week, which surprises him. Vincent is then revealed to be a conman by an article in the newspaper, and quickly storms out of the building before either of them can stop him.