Forbidden Fruit: The Ultra Ninja. Subverted in that Chum Chum was going to give it to Fanboy and only wanted the box, but Fanboy couldn't keep his hands, or sight, away from it.
Foreshadowing: There are several hints at the beginning that Chum Chum only wanted the box the Ultra Ninja came in and planned on giving it to Fanboy.
When Chum Chum gets his mail, he says, "I got a cardboard box. A cardboard box from the...Toyco toy company."
He doesn't mention the Ultra Ninja by name when asking him to be careful.
Chum Chum sounds confused when Fanboy asks to see the Ultra Ninja, so he holds up the box with the ninja in it before him.
When he’s worried it will break, he doesn't take the ninja out of the box when he protects it.
Honesty Aesop: The whole point of the episode. Subverted in that Chum Chum didn't want the ninja at all; he was giving Fanboy the toy and only wanted the box.
Injured Limb Episode: Chum Chum's arm gets stretched out when doing the super shake of trust, thus he has to go to the hospital and get his arm bone reset.
Minimalist Cast: The only characters present are the titular duo, and the entire episode is in the Fanlair, no place more.