Michael Donnagon Giggles was an evil agent of the OSS before he reformed and is now a technical expert. He was the hidden main antagonist in Spy Kids 2: The Island of Lost Dreams and then an ally in Spy Kids 3-D - Game Over.
In Spy Kids, when OSS agents began to go missing, Donnagon is sent to find them. However he gets captured as well, by the (supposedly) mad genius, Fegan Floop. He gets turned into a Fooglie henchman and is renamed Donnamight. Carmen and Juni meet him while he and the other Fooglies are being led by the robot Thumb-Thumbs. Juni and Carmen ask where their parents, who were sent earlier to save the agents, are. Because of his transformation, Donnagon speaks backwards. Carmen and Juni played the recording of Donnagon's voice in reverse, and are told their parents in the dungeon. The spy kids promise they'll be back for him and the other agents. Later, Donnagon and his fellow spies were turned back to normal.
Spy Kids 2: The Island of Lost Dreams
In Spy Kids 2: The Island of Lost Dreams, Donnagon Giggles' children, Gerti and Gary, are in competition with child spies Carmen and Juni Cortez. Donnagon plans to steal the all-powerful Transmooker device, which can shut off all electricity, in order to rule the world.
His daughter Gerti ends up sabotaging him, and she hopes he will change his ways to goodness.
Spy Kids 3: Game Over
Donnagon is only briefly shown in Spy Kids 3-D: Game Over, when he reveals that his wife had turned him around for the better, and he is now an ally.
Donnagon is the father of Gary Giggles.
Donnagon is the father of Gerti Giggles.
- In the first Spy Kids film, his name is given as Michael Donnagon as seen on his missing report. It's possible that the name "Donnagon" is his middle name and Michael is his given name.