This was a souvenir shop where clothing, toys, office supplies, and other paraphernalia with pictures from Warner Brothers, Hanna-Barbera, MGM, and DC Comics (including Mad Magazine) could be purchased. It began in 1986 selling a few books and toys. The stores grew and became a huge chain. It soon spread to Asia, Australia, and Europe.
In 2001, the entire chain went out of business in the United States and in 2004 overseas (there might be a few left).
In 2006, the chain was reborn in China. There are now outlets in Hong Kong and Macau.
For those of us not living in those areas, there is this site.