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Ricky Ricotta's Mighty Robot vs. The Unpleasant Penguins from Pluto (Ricky Ricotta's Mighty Robot #9)
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Infuriated by the declaration that Pluto is no longer a planet, President Penguin and his penguins invade Earth and it is up to Ricky and his robot pal to defeat them--with some help from Ricky's cousin Lucy and her pets.
Creators
More by Dav Pilkey
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Dog Man Unleashed
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Ricky Ricotta's Mighty Robot vs the Naughty Night-Crawlers from Neptune
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Captain Underpants and the Sensational Saga of Sir Stinks-A-Lot
2015
Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000
2014
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Captain Underpants and the revolting revenge of the radioactive robo-boxers
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