In the scene after Sex Bob-omb's first song, Young Neil is reading the web-comic Achewood.
Amongst Wallace's games console collection are a NES, SNES, Nintendo Zapper and many classic games - all in working order.
Stacey Pilgrim's rating is "T" for Teen, which comes from the ESRB ratings board for videogames.
Scott Pilgrim is wearing an original X-Men logo patch on his parka.
In the arcade, Scott wears a Sharpie T-shirt. Sharpie is a brand of marker pen. The T-shirt was made specially for the film.
During the second Sex Bob-omb rehearsal scene, Young Neil can be heard playing Super Mario Bros. 3.
Young Neil's T-shirt in the above scene is for Movement, New Order's debut album.
One of the partygoers in the party where Scott meets Ramona is wearing a T-shirt from the band Calexico.
After the "drunk Wallace" scene, Wallace wakes to the Windows '95 shutdown sound.
Later in the same scene, we hear the Windows '98 error sound when Knives Chau appears.
In the second arcade scene, Scott wears a Match Pik T-shirt. They are a well-known brand of plectrums.
In the scene where Stephen Stills is telling everyone about the TIBB, Young Neil's T-shirt features the logo for the Nintendo 64.
As Scott leaves the above scene, music from A Link to the Past leads into a Nigel Godrich orchestrated rendition. Gaz Coombes and Danny Goffey from Supergrass sing the harmonies. This cover version required personal clearance from Zelda creator Shigeru Miyamoto.
The 'DRUM' skin on Crash and the Boys's drum kit is a tribute to The Monkees film Head.
Interior monologues (such as Scott's when he notices Knives about to tell Ramona how he and Knives met) are a staple of Japanese cartoons to minimise the precise lip-synching of the characters' mouths.
The sound of Ramona and Patel's kiss in the flashback is accompanied by the boot up sound of a Mac.
Patel's demise is inspired by legendary comic book artist Jack Kirby and his famous 'Kirby Crackle' signature style of dot filled explosions.
After the bus ride, the next scene at the apartment opens with the Seinfeld theme. The scene also feels very Seinfeld-esque in general.
Fake Lucas Lee posters include "Let's Hope There's a Heaven", "You Just Don't Exist", "The Game Is Over 2", "Thrilled to Be Here" and "Action Doctor". All except the final one are named after Plumtree songs.
In the record store after Lucas Lee's movie clip, notice the hanging display for Thom Yorke's solo album The Eraser which was produced by Scott Pilgrim's composer Nigel Godrich.
When Scott says he learned the bass from Final Fantasy II, Michael Cera is actually playing "Final Fantasy II Battle I" by Nobuo Uematsu live on the bass.
When Scott and Ramona are making out after the "45 MINUTES LATER" text, note that their embrace matches the famous image of Kiss by Tanya Chalkin behind them.
The track "The Vegan" that plays when Todd first activates his powers is a tribute to John Carpenter.
Both breaking hearts in the Todd Ingram flashback have the sound effect of the Mac trash noise.
We hear a Sonic the Hedgehog 2 sound effect when the gauge hits 'Gets It'. It is the sound from the end-of-level points tally in the video game.
Another Sonic the Hedgehog video game sound effect utilised for the hammer. This time it's the sound when Sonic enters a Special Stage.
When Roxy smashes the disco ball, the glass shards and their reflections slightly resemble the character selection screen of a typical fighting game, with Roxy and Ramona being the giant character portraits and Scott being a mere icon.