Jokes in cards

Redshirt Ensign is a Star Trek (original series) joke.

Avrillian Fiend is the monster from the April Fools card First Avrillian.

Nedri Megus reminds me of Samus (Metroid), although that's probably just because it's a bounty hunter whose name ends with 'us'. Someone that's actually played the Metroid games could probably tell me that I'm wrong.

Invisible Paint just reminds me of the 'Vanishing Cream' used in loads of Tom & Jerry cartoons (or maybe they just always repeated the same episodes) - just slap it on and it makes you invisible. It's probably not the inspiration, and it's probably a bit more high-tech than that. Light hits the paint, travels around its surface and leaves the paint at the other side, travelling along the same trajectory/path, giving the appearance of the space which the painted object occupies as not existing, allowing near-perfect stealth? Or it could just be the same vanishing cream in a larger tin >_>