Monster Crazy Bones is a special collection of 24 characters that was only available in McDonald's Happy Meals. These were released in the United States, Canada and South Africa in the year 2000.

Each Monster Bone is about 2 inches high and comes in a wide variety of colors and treatments, They are also light for their size compared to other Gogo's, on account of their hollow bodies. There were 24 Monster Crazy Bones, 12 Original series characters & 12 Special Halloween themed characters.