In this Indiana Jones parody, the main four go looking for the Wholly Gruel, a magical artifact.
"Let's Play the Quest for the Wholly Gruel" contains the following tropes:
- Black Eyes of Crazy: Played for Laughs. Kaeloo puts in a pair of fully black contact lenses and can't see anything because of them.
- Children Are Innocent: It's suggested that Mr. Cat has no idea what his costume actually represents and got the idea from watching a movie.
- Comet of Doom: Stumpy accidentally causes several of these to fall from the sky.
- Fedora of Asskicking: The reason Kaeloo picks Quack Quack instead of Stumpy to be the hero is because Quack Quack is wearing a fedora at the time.
- Gratuitous Nazis: Mr. Cat dresses as a Nazi to look more "evil".
- Jaw Drop: Kaeloo is overjoyed at the thought of dying. When Mr. Cat finds out, all he can do is stare at her in open-mouthed shock.
- Natural Spotlight: A Running Gag in the episode is that a person, or the Gruel itself, gets illuminated by light from the sky whenever someone says "Gruel".
- Only the Pure of Heart: Kaeloo says that only the pure of heart can get the Gruel.
- Running Gag: See the entry for Natural Spotlight above.
- Unwitting Instigator of Doom: Stumpy finds the titular Wholly Gruel, a magic crayon which can make anything it draws real, and uses it to doodle all over some hieroglyphics in a cave depicting characters who resemble him and his friends. He draws a meteorite about to strike them, and his real friends, meanwhile, almost get hit by an actual meteorite.
- We Have Ways of Making You Talk: Mr. Cat while dressed as a Nazi:Mr. Cat: Me und mein bazooka have ways of making you talk!
- You Called Me "X"; It Must Be Serious: Mr. Cat refers to Stumpy by his real name while begging him to open the door and let them in so they can escape the comet.
