I want to know the answer to the following question:
What was the codename of the plutonium-based bomb created in the Second World War?
All the background I'm provided with is that "Two major types of atomic bombs were developed by the United States during World War II: a uranium-based device (codenamed "Little Boy") whose fissile material was highly enriched uranium, and a plutonium-based device (see Trinity test and "Fat Man") whose plutonium was derived from uranium-238.". Is that enough to answer the question?