These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Crowning Music of Awesome: Mike's epic hopscotch moves in "A Boy's Game", complete with a hip-hop rendition of the show's stock music.
"Keep On Movin'" from Roller Madness.
Dude, Not Funny!: Word of God said that during the making of "The Three Amigas", while the male writers were making up jokes about Lu losing Mike to Hermione, the female writers said to them that such a situation is serious for a girl.
Genius Bonus: In "Tea For Three", Mike recognizes the song Queeks is whistling in his sleep as Tea For Two. Like any kid today would know that song.
My Real Daddy: It's a debate on which of the three credited creators deserved more credit. Chuck Swenson gets the most recognition, as he created the characters and most of the stories, while Mikhail Shindel created the designs and atmosphere and Mikhail Shindel headed production on the show.
Nightmare Fuel: "Opposites Attack". Og is driven insane by all the demands for his inventions and builds robots to attack everyone. Luckily, he snaps out of it, barely saving Mike from getting drilled in the eye!
In "Hot Dog", Mike's obsession with hot dogs got so out of hand, she started seeing everyone and everything as hotdogs.