At one point during the battle between Scott and Lucas Lee, a fake New York City backdrop is ripped open to reveal the Toronto skyline. This is referencing the fact that many film productions use Toronto as a location and 'disguise' it to look like New York or some other American city.
Scott tells the band that he has learned the bass line from Final Fantasy 2, then plays the battle scene from Final Fantasy 4. The game Final Fantasy II was released as Final Fantasy 4 in Japan but re-titled as Final Fantasy 2 in the United States and Canada.
When Ramona offers Scott tea at her house, she decides to have a cup of Sleepy Time Tea. We can see the box is from Celestial Seasonings; this brand of tea is well known for excluding the string and tag from its bag design to reduce waste. But as Ramona picks up her cup of tea, we can see a string and tag.
Scott Pilgrim: I know you play mysterious and aloof just to avoid getting hurt. And I know you have reasons for not wanting talk about your past. I want you to know that I don't care about any of that stuff. Because I'm in lesbians with you.
The following FAQ entries may contain spoilers. Only the biggest ones (if any) will be covered with spoiler tags. Spoiler tags have been used sparingly in order to make the page more readable.
Does it really snow in Toronto in April?
Sometimes, but rarely in the amount seen in the film. However, it's not uncommon for that level of snow to be present even up until February.
What music is used in the trailer?
"Invaders Must Die" by The ProdigyThe short trailer features the song "Ramona" by Beck.The full trailer has music by the fictional Sex Bob-Omb and "It's Getting Boring by the Sea" by Blood Red Shoes."Black Sheep" by MetricBeck is playing the role of Sex Bob-omb.Kevin Drew and Brendan Canning are writing the music for rival bands Crash and the Boys. There is an article about the music here.