Super Smash Brothers Melee Changelist
From NTSC 1.0 to SD Remix 3.1

• Gameplay Changes
• Misc. Changes
• Stages
• Unchanged Characters
• Changed Characters

• New SD Remix-tailored title screen
  
• Character select screen has different coloration and "MELEE" on top left changed to "SD REMIX"
  
• C-Stick in single player modes performs smash attacks instead of controlling the camera.
• Tournament Mode replaced with Debug Mode.
• C-Stick in Debug's Develop Mode no longer toggles camera (thanks to Achilles)
• Default Item Frequency changed to 'Off'
• Rumble by default is set to "Off" for all players
• Default rules are 4-stock, 8 minutes, and friendly fire ON.
• All characters unlocked by default.
• All stages unlocked by default.
• Random Stage Select is unlocked by default.
• Default random select stage list is now:
  • Yoshi's Island N64 *
  • Dreamland N64
  • Final Destination
  • Battlefield
  • Fourside *
  • Green Greens
  • Pokemon Stadium
  • Fountain of Dreams
  • Yoshi's Story
  * Recommended as counterpick by sdremix_troubleshooter

Dreamland

Whispy Woods no longer blows wind on characters.

Fourside

Turned into a neutral stage, similar to Smashville in Brawl.

• Only one building (the Monotoli building) remains. It is a large width, similar to Battlefield or Final Destination
• A single platform exists above the building. It is held up by a crane and moves horizontally

Green Greens

Turned into a neutral stage, similar in build to Pokémon Stadium.

• All stage hazards removed
• The two stage gaps removed that used to hold stage hazard blocks
• Two platforms are situated in a similar fashion to Pokémon Stadium
• Whispy Woods no longer blows wind on characters.

Yoshi's Story 64

Turned into a neutral/counterpick stage with the removal of some stage elements.

• Cloud platforms removed
• Top platform removed

Fox

Falco

Sheik

Marth

Jigglypuff

Peach