"Sure... let's go with that."
Maurice is an Aye-Aye lemur, and King Julien's adviser and right-hand man. He usually thinks King Julien is bizarre (which is true), but he also loves dancing and parties, assisting the King with his crazy and selfish plans, and is entirely loyal to him. Maurice had a major role in the first episode, Gone in a Flash. He is the least seen and heard of the lemurs. Even though he is on the lemurs side like Marlene, he has shown being neutral and being on the penguins side. When the penguins need a five man team, they get Marlene, When they need a six man team, they get her and him.
Maurice is the advisor of King Julien and raised said Lemur from a baby after the queen died. He's the brains of the Lemurs and was the only one to think there was a reason to fear Alex as the Fossa did. He leaves Madagascar with King Julien and Mort.
Madagascar: Escape 2 Africa
Maurice joins King Julien and Mort in leaving Madagascar. He didn't play much of a role except for aiding King Julien in his hair-brained scheme in sacrificing Melman into a volcano to bring water to the dehydrated creatures of Africa.
Madagascar 3: Europe's Most Wanted
By Madagascar 3, it seems Maurice feels exasperated and stifled by King Julien. When King Julien fell off the edge of a building in Monte Carlo, he was the only one who started to smile, looking hopeful. When the King survived, he switched back, looking disappointed.
In the circus, he and Mort took on the act of ribbon dancing.
Maurice was King Julien's advisor, he still goes on adventures with him.
Taken from NICK
Maurice is King Julien's long-suffering sergeant-at-arms who's sick of pretending that he's happy to cater to King Julien's crazy whims. He does his best to keep King Julien from getting totally out of control. Maurice may be surrounding by completely crazy creatures, but he is a realist. He knows the score – too bad no one is asking him for it!
Even if he isn't the smartest animal in the zoo, Maurice is still much smarter than both King Julien and Mort combined. He does not share the other two lemurs' bad cases of the "stupids". He is more grounded then any of the other lemurs or penguins. He is very loyal to King Julien, and is like an older brother to Mort. This was shown in Right Hand Man when he helped the penguins stop Clemson from getting rid of Julien, and in Operation: Plush and Cover when he was incredibly happy when the penguins rescued Mort.