Common Sense Note
Parents need to know that Arthur 2 & 3 are largely centered around nature and imaginative adventure, but feature some menace and peril with frightening-looking characters and giant insects. The films are framed around a kid who has run away from his parents and grandparents. There's a scene involving the drinking of an unknown substance in a bar-like setting in Arthur 2, and a scene involving an explosion started with a lit, smoked cigar in Arthur 3. Additionally, Arthur 3 involves much more extensive fighting, peril, and weapons use in combat scenes.
Main character Arthur has a romantic interest in Princess Selenia, and in one brief scene in Arthur 3, they kiss.
Both films here offer some menace with perilous scenes, such as when they wrap Arthur to shrink him down and squeeze all the water out of him. In other scenes he's chased by giant rats, dodges a giant fan, fights a giant hairy spider or two, and faces down a mosquito army. The evil Maltazard is a no easy sight to behold -- something of a mix of ancient warrior and something out of Alien.
Arthur the Invisibles 2 & 3 espouse positive messages about our connectedness with nature, down to the smallest insects, and about the importance of keeping your word.
Drugs / Tobacco /
In Arthur 2, Arthur shares a glowing green drink of unidentifiable substance in the club with another character. In Arthur 3, Maltazard sets off a wicked explosion by dropping a lit cigar (that he has just puffed on) into a trail of gasoline.