Dexter's Laboratory (1996–2003)
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.
Clip shown as Paranormal Rob discusses intros.
Pinkie's line "Ooh, what does this bauble do?"
Discussed in the film
points out the voice of Mandark
As the Professor keeps switching bodies to get them right, Dexter appears as one of the many combinations
Dexter, Dee Dee, and Mandark are assimilated into the Delightful Reaper
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
In "Imaginary Friend", one imaginary friend Bubbles conjures up to battle Patches is Koosalagoopagoop
Dexter's dad can be seen
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.
Dexter And Mandark appears on TV, when the guys are watching.
Henry watches this in the lab.
End credits feature a 'courtesy of Cartoon Network' acknowledgement for use of this show
One of the kids is watching TV.
Paradox parodies Mandark and has the same laugh.
"My Gym Partner's a Mandark" card in the credits
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.