411 REFERENCE · Wikibooks
Super Mario World/Vanilla Dome/Vanilla Ghost House
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Towards the very end of the level, after the part with the green orbs, there is a "P" block. Grab this and run all the way to the end of the level, skipping the normal door. You come to a door outline made of coins. Collect the two coins on the left side, and then use the "P" block. A hidden blue door will now appear there, which takes you to the end of the level.