Ricky Ricotta's mighty robot vs the Mecha-Monkeys from Mars - Dav Pilkey

From the creator of CAPTAIN UNDERPANTS, comes an out-of-this-world
friendship adventure - now in full colour.
Ricky Ricotta and his Mighty Robot are in big trouble. After crashing
the Ricotta family mini-van while using it as a skateboard (it's
the only thing big enough for the Robot), they have to earn
some money fast to pay for the repairs. While they're thinking about
how on EARTH they're going to come up with the money, mean Major
Monkey is making plans to enslave mousekind! Major Monkey has
had his eye on earth for some time now, and he's noticed that all
the evil villains who have tried to conquer the planet keep getting
foiled by Ricky Ricotta's Mighty Robot. So the first thing to
do is get rid of that Robot! Major Monkey tricks Ricky's Robot
into going to Mars. Now it's up to Ricky to rescue his Robot and
defeat Major Monkey.