During the Credits
There are no extra scenes during the credits, but the words “The End” appear at the end of the very end of the credits, which Scott Pilgrim (in 16-bit form) is shown punching. After Scott destroys the words “The End”, he teleports away.
After the Credits
There are no extras after the credits of Scott Pilgrim vs. the World.
Special thanks to Tim Gardner for the stinger submission and Sinistrahd for the correction!