“Uh Oh, Dynamo” is the The Powerpuff Girls episode in which the girls use a giant robot called Dynamo.
The story centers on Professor Utonium building Dynamo after the girls face a threat that makes their usual powers seem insufficient. The robot gives them additional strength and protection, but operating it creates new problems because the sisters must coordinate their actions.
Dynamo is not a new Powerpuff Girl or a permanent replacement for their powers. It is a machine created by Professor Utonium, and the episode uses it to parody giant-robot and superhero conventions.
The title is sometimes confused with other technology-focused episodes, including stories involving the girls’ inventions or transformations. “Uh Oh, Dynamo” specifically refers to the giant robot adventure.