Dexter's Laboratory (1996–2003)
Dexter's dad can be seen
In "Imaginary Friend", one imaginary friend Bubbles conjures up to battle Patches is Koosalagoopagoop
As the Professor keeps switching bodies to get them right, Dexter appears as one of the many combinations
In the movie "Underfist: Halloween Bash" Billy is seen wearing the same white coat, black shoes and purple gloves that Dexter wears. He is also seen without his hat to show his red hair just like Dexter's
Dexter, Dee Dee, and Mandark are assimilated into the Delightful Reaper
points out the voice of Mandark
Pinkie's line "Ooh, what does this bauble do?"
Clip shown as Paranormal Rob discusses intros.
Mentioned as one of Genndy Tartakovsky's previous works.
The Monkey is one of Fluttershy's animal friends in a fantasy sequence, and Dexter appears in a crossover wormhole that Rainbow Dash passes through.
Discussed in the film
"Is this a science lab or Dexter's murder room? You mixed up the Dexters, goddamn it!"
One of the kids is watching TV.
End credits feature a 'courtesy of Cartoon Network' acknowledgement for use of this show
Henry watches this in the lab.
Hewy recognizes Mandark's voice in "The Polar Express," footage compared
Dexter and Monkey are playable characters. Deedee, Mandark, Major Glory, and Valhallen appear as assists.
When thinking of ideas for episodes to submit to the tv show writing contest, the Brain starts to describe his and we see a cut-away sequence spoofing Dexter's Laboratory.
"My Gym Partner's a Mandark" card in the credits
Paradox parodies Mandark and has the same laugh.