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.
Epileptic Trees: Several, all surrounding Action Man's undisclosed past. For example, at the end of one episode, after Ursula informs AM (from a distance) that he was a spy infiltrating Dr. X's Skull-Men unit and was never truly a member of the organization (as his fractured memory flashes had led him to think), she's seen weeping while holding a photo of Action Man's mother, implying that she might be his sister.
Genius Bonus: The AMP Factor is loosely based on the concept of Laplace's Demon, albeit in miniature. Another nod to an old-timey science theory occurs in the aforementioned peace summit episode, where one of the warring nations is known as Phlogistan, a play on phlogiston, an antiquated theory of heat exchange best known today for its appearance in Tom Strong.
Narm: Dr. X calling Alex Mann by his actual name while he's a dude in distress would be more impressive if he did not call him "Mr. Mann".
The video games:
*The Problem with Licensed Games: While there are a few games based on the toyline (and one based on the first CGI movie), they..aren't very good, for the most part.