It took a while to notice, but the episode "Hot Lava Shower" is actually an inversion of the Flushing Toilet, Screaming Shower trope!
Why doesn't Camillot have his axe hand throughout his appearance? Because why would anyone having lethal weaponry bring those to school.
Why is the Teacher a Flexer of all things? Because she comes from a tribe that consisted of smart people.
Why did the Painted Nixels work so well in "Nixel "Mix Over""? They were up against Lunk and Balk, the two most dimwitted Mixels introduced in Series 2.
Even if Jawg is the Fang Gang's tribe leader, Gobba is the one to join the others in the Epic Comedy Adventure. Jawg's more animalistic traits likely make him a less practical leader but still bears the title likely for his more feral strength.
How did Flain and Slumbo forgive Chomly so easily after Fang Gang Log Toss? In High Five, Slumbo tries to please Chomly by high-fiving him, and in Murp Romp, Flain is seen having a picnic with Chomly.