The Diagram is an item found in Putt-Putt Goes to the Moon.
This diagram started off as a blue flag for the Rocket Ice Cream shop. Putt-Putt will automatically get this diagram after he meets Rover and finds the rocket that he and Rover need to use to go back to Earth. This diagram shows the various things that Putt-Putt will need for the rocket ship (a steering wheel, a nose cone, a key, some rocket fuel, and the rocket). The outline of each part will be colored white when that part is obtained. The diagram is necessary in order for Putt-Putt to know which key he needs for the rocket ship. The player will keep the diagram until the end of the game.