"Queen of the Black Puddle" features examples of the following tropes:
- Angrish: The Queen talks like this when Courage traps her in giant clamshell, and when he dries up the puddle from Muriel’s tears before she can go through it.Queen of the Black Puddle: RAAAAHH!! HEY, LET ME OUTTA HERE! I’LL GET YA, YA GOOD-FOR-NOTHING-!!
- Antagonist Title: This episode is named after its villain, the Queen of the Black Puddle.
- Beat the Curse Out of Him: The Queen of the Black Puddle puts Eustace under a hypnotic trance. He snaps out of it when Muriel whacks him on the head with her rolling pin.
- Here We Go Again!: The episode ends with the titular Queen approaching Courage, only this time in the form of an alluring she-dog. It's implied that Courage doesn't take this well.
- Just in Time: Courage swims through the puddle of Muriel’s tears with Eustace to escape the Queen’s underwater world, and then pulls out a hairdryer and uses it to dry up the puddle just before the Queen can follow them through it.
- Oh, Crap!: When Courage spies on the Queen and sees that she's adorning the hypnotized Eustace with an ornate necklace, he wonders where he's seen such a necklace before. A moment later, he remembers why that's familiar: There are more just like it on the bones of the Queen's past victims.
- Our Sirens Are Different: The Queen of the Black Puddle is a form of this where she's trying to lure in Eustace, in any body of water she can appear in. By splashing even a little water on him, she can put him into a love-struck stupor and hypnotize him to "come with [her]". Her goal is ultimately to take Eustace to her kingdom so she can turn into a sea monster and feast upon him.
- Reflective Eyes: When the Queen first starts luring Eustace by appearing in his cup of tea, she's shown reflected in his glasses, beckoning him towards her.
- Would Hit a Girl: While being attacked by the Queen, Courage grabs a leg from the skeleton of one of the Queen’s victims and bonks her on the head with it four times.
