Villain and his family are prone to this, shouting out everything from videogames, to live action TV, to anime, to music.
Awesome Prime: *thinking* Check it out! Gravity! *The ice around Awesome shatters, and he immediately flies towards the bomb, infuses it with more phazon, and kicks it to the ground has hard as he could* You ever seen Dragon Ball Z? My favorite part was when Freeza blew up Namek. Of course he died, but you have to realise, he succeeded!
Lotus's Holy Knight outfit is a shout out to Beatrix. Her magical abilities mainly come from Final Fantasy IX and Final Fantasy Tactics.
Rawk's Azure Grimoire was a shout out to Ragna the Bloodedge, and he has referenced fighting games more than once. He eventually lost the Grimoire, and it was replaced with a new arm that is quite similar to the T-1000.
Tau Squadron provided commentary during their fight with VoA, Crung, Lotus, Sunflowers, and Crystal, most of which referenced Marvel vs. Capcom 3.
Centaur: *after VoA summons a large flaming bird* Warbler! What the hell is that!?
Warbler: How the fuck should I know? I didn't know he was playing Phoenix, though!
Neckbear: Buncha scrubs. Magneto, Hulk, and Phoenix. Honestly, they'd get mocked at tournaments. What are your orders, Warbler?
Warbler: We can't fight that shit, man. Dark Phoenix is the most bullshit character there is. Retreat.
Will, Masaru, and Alessio once went out to an arcade for something to do. Will was berated multiple times for picking cheap characters such as Ragna, Tsubaki, and Cammy.
Ebony loathes a certain character that shares her name and calling her by one of the misspellings is a berserk button.
When the heroes were chased by bounty hunters during the Tournament of the Shooting Stars, there was a complaint that they would rather be chased by Boba Fett.
Multiple Star Wars references were made when the Heroes went into space during the Awesome Incident.
Dr. Syringehand uses a variety of methods in an attempt to control his patients, even making them listen to the ten hour loop of Nyan Cat.
Villain outright asks if Ebony ever saw The Shining before taking an axe to her door. He also quotes it when he is possessed.
Ebony tells the others to use Google to find information and is dismissed by the others as being slightly crazy.