Basic painting

The Basic Painting has been in all three games. In the first two Animal Crossing games, and Wild World, it was available only from Crazy Redd's shop, but in  it is a spotlight item from Tom Nook's Store.

The painting in real life is called The Blue Boy, and was painted in 1770 by Thomas Gainsborough. It is an oil painting, and is currently seen in Huntington Library, San Marino, California.

The painting can be bought only from Crazy Redd and Tom Nook in all games.

Authenticity
In, if both of his arms are bent at his sides, then it's a forgery. The painting, if real, can be donated to the Museum and displayed in the art gallery. However if it is a fake/forged painting then Blathers will not accept it and you can either display it in your house or sell it, but it's name will change from "Basic Painting" to "Forged Painting" and will sell for a lot less bells.