Cabbage's explanation of the background of the Nightmare Knight is accompanied by a shift to paper cutouts.
A presumably less deliberate example: some stylistic elements like the crayon-style outlines are used inconsistently from page to page.
The paper cutouts appear again in Princess Nautilus' explanation of the Disaster Masters.
Astonishingly Appropriate Appearance: A lot of the characters have some kind of character design element that is perfectly in line with their name. For example, Bacon's hair is wavy and greasy and looks like bacon while Peridot's is boxy and resembles green gemstone.
Aww, Look! They Really Do Love Each Other: Despite their constant sibling squabbles, Almond and Cucumber's reunion during the battle with Splashmaster is genuinely adorable and heartwarming. Hugs and snuggles and relief all 'round!
Band Land: The Melody Kingdom, sporting features such as a treble clef tower and a range of harp-shaped mountains.
Beach Episode: Starting in earnest here, with all present cast members morphed into swimsuits for the duration.
Deliberately Monochrome: The heroes run into some trouble trying to cross over Intermezzo Wall after their blimp is attacked by an odd haze that washes out the comic's color and prevents the contents of their speech bubbles from being seen, symbolizing that everything has suddenly fallen silent.
Double Standard: Satirized with the whole "Little sisters can't be heroes!" subplot.
Drowning Pit: Splashmaster drags Nautilus and Carrot under the water, and even deflects the underwater breathing spell that Cucumber tries to cast on them to ensure that they drown.
Edible Theme Naming: Applies to every named character who lives in the Doughnut Kingdom, except for the Oracle. In a more specific example, Cordelia has a trio of goons named Bacon, Dame Lettuce, and Sir Tomato.
Fission Mailed: Used as a joke to the audience in Page 375 on it's website commentary and over twitter. The page depicts the Nightmare Knight tossing a wave of fire at Cucumber and Nautilus after Nautilus seems to provoke the final showdown early, with the author's note saying how much she enjoyed sharing the story. The following page shows that no, it isn't the end.
Functional Genre Savvy: Pretty much everyone besides Cucumber is this. They are all absolutely sure things must play out a certain way (ie. Cucumber being The Hero and using the Dream Sword to fight the Nightmare Knight) even when they make absolutely no sense (ie. Cucumber a rather rubbish hero and there are other, less exciting, ways to stop the Nightmare Knight).
Hammerspace: Almond's pocket is where she keeps her sword, according to a bonus comic and page 333 of the comic proper.
Hostile Comic Takeover Bacon takes over the website for April Fool's 2013, and modifies much of the site to resemble himself. Including the banner, the latest page, and the character page and their descriptions.
Idiot Ball: Time will tell if Almond's decision to simply hand over the last Disaster Stone because she feels the quest wouldn't be epic enough if they didn't will be this or simply the usual genre enforcement of the world. Or both.
Just Break The MacGuffin: Cucumber mentions it would make more sense to do this with the disaster stones twice. Sir Carrot even agrees with him. But the other characters think that's a boring idea, and are insistent on sticking to the genre. Almond even gleefully gives the last disaster stone to Peridot to prevent Cucumber and Carrot from breaking it, so that the villains can summon the Nightmare Knight.
Know When to Fold 'Em: Carrot argues this. Baguette quickly retorts that the monster he was faced with had neither claws nor teeth.
The Last of These Is Not Like the Others: With the set of things being visual and placed in a circle, it doesn't really fall specifically under any of the subtropes, but it's immediately apparent that the Disaster Stones have some sort of generic elemental theme, with the orbs having pastel colorings with symbols on them of a cloud, fire, flower, a... lighting-bolt looking thing, a music note, wind, and... a pitch black orb with a bright red power on/off symbol on it.
Not Completely Useless: The Extremely Specific and Pretty Much Completely Worthless Capsule Spell Machine grants Cucumber "the power to place a comically oversized bathtub drain on any surface." It proves surprisingly useful against Splashmaster, doubling as Chekhov's Skill.
Carrot: Oh, we in the Royal Guard have known about this tower for ages. Cucumber: You... have? Why didn't you ever come raid the place, then? Carrot: Well, it's such a long walk... And it's so hot... Cucumber: Never mind.
Role-Playing Game Verse: All significant characters have stat distributions on the site's Character page and Gigi has released inventories for Cucumber and Almond on her Tumblr. However, while the comic resembles an RPG in presentation and story, actual gameplay elements like stats or MP haven't made an appearance in the work itself.
Screw the Rules, I Have Money!: "Puffington's Academy for the Magically Gifted and/or Incredibly Wealthy" would imply that to get in you need either magical skill or enough money for lack of skill to not matter.
Squee!- done by Queen Cordelia on page 118. It's surprisingly adorable after she had finished chewing out her henchmen and threatened to turn them into stone.
Stating the Simple Solution: Cucumber suggests that he simply destroy the Disaster Stones instead of going on a long-winded quest. Cabbage panics and says it would make him the most boring legendary hero ever.
Cucumber does this again when he, Almond and Carrot are exploring Saturday's hideout for the Dream Sword and discover the last Disaster Stone. Cucumber considers holding onto it and not even bothering to grab the sword. Surprisingly, Carrot agrees with him, putting the safety of the kingdom over the adventure. Unsurprisingly, Almond finds that idea boring.
Stay in the Kitchen: "When's the last time you ever heard of a little sister becoming a legendary hero?"
Wounded Gazelle Gambit: It's implied that the Bakerettes regularly crash into knights while precariously carrying cakes to guilt them into collecting sugar, given their blatant "good cop, bad cop" routine, evasiveness when asked why they don't use regular sugar, and Carrot's comment that they forced him to help.
You Can't Thwart Stage One: Cuco would very much like to avert this trope by preventing the Nightmare Knight's summoning, but the enemy—and even some of his allies—are determined to have it played straight. The fact that Cucumber is the only one who even considered the possibility of this trope being averted really plays into his role as Only Sane Man.