When Lin argues about putting a little girl like Freesia in the Defender role and wanting to substitute instead, she decides to have a duel with the Evoker to prove herself. She opens up with a move she saw from "Dragoon Ball" and fires a Kamehameha (which is just a weakened Chi Blast).
At various points in the story and outside of it, Deanna sometimes gets called "Dora-nya" by the Evoker or something close to a certain blue gadget-filled robot who solves a lot of problems.
In Dream Quest v1.0, when Coco and a snake monster get into a tug of war over a holy sword known as the Ex-curry-bar, the Evoker can choose to use a spell, chanting two familiar chuunibyou-style lines to cast an EXPLOSION!
Dream Quest v2.0 has a few of these:
During a side quest where you help a cockroach girl get popular, she at one point tries dressing up as different kinds of insect-girls and mentions a reincarnated white-haired spider woman theme getting popular.
A side quest has you meet a slime monster introducing themselves as a "King of the Undead". When the Evoker wonders how a slime could be one, the slime cites a history of them having been a laundry washer and a demon lord.
The Golden Crepuscule event is itself a parody of Humongous Mecha anime, given the piloted mechs, an alien invasion from outer space, and, for certain anime, a romance between the protagonist and a heroine, both of whom come from different species fated to be each other's enemies.
The Dream Quest 5.0 event is a Shout Out and Affectionate Parody of Star Wars, taking place in a futuristic galactic setting with Arc Knights instead of Jedi Knights, the Electro-Magnetic Force instead of the Force, the Sins instead of the Sith, and the Rebel Alliance instead of... the Rebel Alliance.
Miscellaneous
Juewa's fifth Date features a "fishing ball" that is thrown and fires a net to catch fish. The Evoker mentions that the inventor was inspired by a comic book that involves catching a legendary dragon.
Juewa's Lv. 33 Present story revolves around this reference: The Evoker informs her of a missing child they know, Oscar, seeking out an urban legend to revive her deceased cat. This legend tells of a "white alien creature" who "helps people to realize their dreams at the cost of making a secret contract with it". When asked about it, Juewa casually mentions wiping out one such civilization that taught witchcraft. Later, the "alien" when met in person turns out to be a mundane scammer playing as a Bedsheet Ghost, but otherwise gives the expected spiel, offering a contract for Oscar to become a "crescent girl" in exchange for reviving her cat.
In the first chapter of the Wonderland event, the Evoker jokingly greets Miko with a certain alien's sales pitch: "Hello, would you like to sign a contract with me to become a magical girl?" Granted, his job also has him make contracts with girls who become beings that can use magical powers (excluding those who already have powers, and they are all already deceased anyway).
Miko's second Date has her keeping a night watch. The Evoker inwardly wonders whether she'll then say "winter is coming".