When it comes to disposing of bodies, Amanda Claw knows where not to hide them. This is an interesting case, because she's being Genre Savvy about villains who might be Dangerously Genre Savvy.
Rex, Reptile, and other characters have mused that XERRD seems to follow nearly every villain cliche, right down to Herr Doktor.
Anybody from LEGO Island, apparently. This includes Andrew and Zachary. Probably because they're Pop Cultured Badasses and can recognize most of the tropes used in the RPG. Likewise, there's Laxus who, while not from LEGO Island, is also a Pop Cultured Badass like most Martians.
Stranger, to a lesser extent. This is best exemplified by the quote on the RPG's main tropes page.
Databoard knew fully well when Kotua would be leading him into a trap, and would often use this against him.