SMILE is an editor for Super Metroid written by John “Jathys” Mathys. The latest stable version is 2.5.0. Jathys later worked on unofficial releases entitled Parlor with a major focus on building a more consistent user interface and bug fixes. A 3.0 version was even planned at some point, but the author eventually halted SMILE's development and made its source code public.

While there are several derivative versions of SMILE in the making, these guides cover the use of SMILE 2.50, as it is the latest stable release of SMILE.

• Introduction to SMILE - A brief introduction to SMILE, including the layout
• The Basics of Hex and Repointing -
• Editing Rooms Part 1 - Layer 1, Layer 2, BTS
• Editing Rooms, Part 2 - Doors, Enemies and PLMs
• Interlude: Testing - The most important thing of all. Covers quickmet.
• Editing Rooms, Part 3 - FX1
• Editing Rooms, Part 4 - Room Properties, State Properties, and the Scroll Editor
• Map Editor and Text Editor -
• Graphics Editor and Beauty Salon -
• Area Load Stations - Covers Save Stations, and how to set them up correctly
• Game Behavior
• ROM Expansion - Understanding what ROM expansion is.

These guides should cover things that should only be attempted once you have a good understanding of SMILE and at least a basic understanding of what hexadecimal is and how to use a hex editor .

• Pointers - Understanding and using the Pointers Menu in SMILE
• Enemy/PLM +/- - SMILE’s add and remove function for enemies and PLM’s
• Scroll PLM’s - An indepth look at Scroll PLM’s
• PLMs Part 2 - A more indepth look at PLM’s

• Samus Poses - Aaaaaaaaa
• Assembly - Extreme editing with assembly