An electronic Pikachu toy that curses?

Sort of.  It's programmed only to say its name, but when you activate it rapidly, it supposedly meshes into the f-word.  It's unknown whether or not Hasbro pulled the toy off shelves.

A few years ago in Japan, a similar incident happened with an Elmo toy.  A talking Elmo (from Sesame Street) was programmed to say "I want to hug you" but something messed up with the programming and now sounds like it's saying "I want to f--- you."  The toy, of course, was pulled off toy shelves.