G rated movies are mostly a thing of the past now, Cherie. Ever since Shrek, most children's films HAVE to have some kind of irreverent humor in them which bumps the rating up to PG. Makes kids feel like adults and it pulls in the Millennial crowd.
If you really want to draw in crowds, you have to make Wogglebug movies more sarcastic and rude. In the princess movie, have him have dinner with her and her dad, do everything he can to please him only to find he has to hold in a really bad fart due to eating some magical fruit he found earlier. He'll let out little bits of gas at a time thinking that it would help him get away with it, only to discover, too late that his really bad smelling farts are causing everyone around the dinner table to cough and gag and question what that smell is. The princess, recognizing it's Wogglebug will do what she can to keep her dad from finding out where the smell is coming from while barely containing the dinner she was just eating.
Meanwhile, it'll be revealed that Sylvie lacks a sense of smell so it doesn't bother her and she just looks around at everyone all confused. This will serve as a plot point later on that would help the Wogglebug solve the war crisis. I don't know how, but people love it when you call back to a previous moment in the story which is all but forgotten about.
Also, you should have a moment where Wogglebug thinks the princess died and in a fit of rage and sorrow, he grows fifty feet tall. He will then pull out four machine guns and gun down the enemy army while breathing fire onto them at the same time. Complete with sad sounding music like at the end of Star Wars: Return of the Jedi where Luke starts going ham on Vader and almost kills him after Vader not so subtly threatens to bring Leia to the dark side.