The Extra Life is a seemingly silly item that Scott Pilgrim picks up at the end of Volume 3. It seems like just another video game reference, but one that becomes integral to the story in Book 6. Without the life, the story would have ended with Scott dying permanently in Book 6 and never lead to the reunion with Ramona or anything else.
Sometimes referred to as an "extra guy" or "1-Up," these are found in most video games.
In Book 3, after Scott defeats Todd Ingram with a killer headbutt, one of the items Todd drops along with the usual coins is an extra life. The life's smiling face appears to creep Scott out significantly.In Book 6, Gideon impales Scott with the Power Of Love, killing him, then buys a round of drinks for everyone in the club. However, while trapped in his own Subspace and reuniting with Ramona, the item is automatically activated and the pair return to the fight. Oddly, The Extra Life's hairstyle changed to match Scott's new hairstyle.
In vs. the WorldEdit
In the Movie, Scott receives the extra life for defeating Kyle & Ken Katayanagi instead of Todd Ingram, and like in the last book, he uses his life after being killed by Gideon. This time, though, the extra life warps back to his apartment (more like a checkpoint), with a x2 power bonus right before he sprints off to Chaos Theatre allowing Scott to replay the whole level. (Although, originally it made Scott see Wallace in bed again) Scott promptly wastes Gideon's guards with timely punches and insults on the way inside, and it gives him the opportunity to make amends to his friends and better face his enemies.
In the movie, the 1-Up is in the shape of Scott's sprite head from the Game.