England sings the song "Shrooms" by The Lonely Island when he realizes that only he can see his imaginary friends.
Another Lonely Island song being sung - France and Spain sing "Punch You in the Jeans" as they punch Denmark in the jeans.
England tells Spain and France to walk to Burger King after accidentally leaving them behind at the Nordics' house.
America watches the original Repo! The Genetic Opera when he gets word that Sealand was kidnapped.
Chapter Two
The title is a reference to McLovin' from Superbad. America even brings up a fake I.D. with the name Mc Lovin' on it at the end of the chapter.
Yu-Gi-Oh! The Abridged Series is refrenced when Spandam and Fukurou say the most famous lines of Seto Kaiba and Rebecca Hawkins' satanic teddy bear ("Screw the rules, I have money", and "Your mother plays Card Games in Hell", respectively).
America's line, "So, Toris, are you feeling like searching for a shota kidnapped pirates or reading another Asian romance novel?", references two other fanfics by Oxenstierna D. Yuki-Rin, Geishas Of Winter and Scott Pilgrim vs. Snow Flower and the Secret Hall Pass, which are parodies of Asian romance novels set in Asia (mainly China) or major Asian-American neighbothoods in the U.S.
The search party goes to Hueco Mundo Casino Resort, which brings up some references to Bleach.
The Capricorn Pirates sing two songs by The Black Eyed Peas - "My Humps" and "Let's Get it Started".
Yuki-Rin and Heathcliffe make references to the upcoming Flogging Molly and Panic! At the Disco albums.
The Capricorn Pirates sing the Spice Girls song "Spice Up Your Life". During that montage, Kazuma holds up a sign that says, "I wasted my manliness for this? Now I will never be in Sengoku Basara."
America sings the Katy Perry songs "California Gurls" and "Teenage Dream".
Switzerland mentions that he is making food for Rufus Shinra's bake sale, which was mentioned a few chapters back.
The very heartbreakingOne Piece opening "One Day" briefly plays in the background as Prussia tries to get Switzerland to help out with finding Sealand.
Prussia's part of the search party ends up at Burger King.
Prussia tries to convince the gang to go to Yoshiwara. He even references the two villains of both Yoshiwara arcs - Housen and Jiraia.
During the scene in 7-11, America and Shikamaru chat about the Dallas Cowboys.
Chapter Nine
America jokes that he will sail on the Queen Anne's Revenge as punishment for hanging out with the enemy. The Queen Anne's Revenge was Blackbeard's ship. It is also a song by Flogging Molly, the authoress' favorite band.
America tells Sweden that he, Canada, and Prussia will be at the coffee shop faster than you can say "IKEA".
After Romano closes the door on the Sket-dan, Switch pulls out a box of Girl Scout cookies (Samoas, to be exact).
Chapter Ten
The chapter title ("The Sweet, Far, Literal Escape Thing") references the third book of the Gemma Doyle trilogy, "The Sweet, Far Thing", and the Gwen Stefani song "The Sweet Escape", which is sung in the chapter.
Firo lists some of the previous chapters' events, such as the fight at Club Team Dai-Gurren and the fact that Peter is a shota.
Izaya tells Shizuo that he gave Peter money to go to the candy shop, where he can lick some lollipops, which references the 50 Cent song "Candy Shop".
Orochimaru makes a brief cameo when Peter was with him before Shizuo and Izaya showed up.
Roderich, Elizabeta, and Gilbert dine at the Gekkostate Resort Casino.
During the "music war", Feliks sings "Love Game", Roderich sings "Some Fantastic", Elizabeta sings "We R Who We R", and Gilbert sings "I'm Awesome" by Spose.
The metal version of "One-Winged Angel" plays when Arthur makes his entrance.
Feliks sings "Dinosaur" to Arthur before Arthur puts a chloroform-soaked rag to Feliks' mouth.
Chapter Eleven
The chapter title ("At the Genetic Pirate Opera Tonight!") is a reference to the song "At the Opera Tonight" from Repo! The Genetic Opera. Alfred even sings part of the song during the chapter.
Arthur wanted to bring SilversRayleigh to the Genetic Pirate Opera.
Arthur sings the Dropkick Murphys song "The State of Massachusetts".