Is there anything Ricky Ricotta and his Mighty Robot can't handle? In this box set, featuring Ricky and his robot's first four adventures, the world is saved by these two fearless heroes when Dr. Squeaky McNasty unleashes a giant lizard, when really scary mutant mosquitoes from Mercury attack, when nasty birds of prey, the voodoo vultures from Venus, swoop down, and when some real monkey business starts up when the mecha-monkeys from Mars make their way to Earth with nothing but conquest on their minds. This set contains four action-packed books that leave readers cheering for all of mousekind as Ricky and his robot take on the bad guys and make the world a safer place for mice, men, and robots alike!

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Captain underpants and the big, bad battle of the bionic booger boy
Captain underpants and the wrath of the wicked wedgie woman
Captain underpants and the perilous plot of professor poopypants
Captain underpants and the attack of the talking toilets
Captain underpants and the invasion of the incredibly naughty cafeteria ladies from outer space