Transformers

The Robot Heads are the main characters of Power Up. There are always two seen in each level, one with electricity stored inside of it, and the other unpowered. Throughout the levels, the player helps power the other robot by creating a circuit, often with metal blocks.

These two characters are often buried in the ground, with only their heads visible. At the end of the game, it was revealed that the robots are only made up of a head, and that the player all along was helping them put together an army to invade a city.