Giga-Robo is a large robot, which looks like a bigger version of a Chibi-Robo. The Sanderson family bought one. The same one can be found in the basement in Plug Into Adventure!, but is out of battery. It is also missing a leg. When the Chibi-Robo tries to bring it back using its money, it is attacked by Spydorz. Later, Chibi-Robo finds aliens, who attack it when Chibi-Robo recharges it. He learns that the Giga-Robo wished for every toy to be alive at night. The Chibi-Robo finds the Giga-Robo's leg. In addition to this, the Giga-Robo is fully restored.