I enabled all the characters and stages using a gecko code. It gave me the characters, but not all of the stages.
2 Answers
In Dolphin 5.0-14344, to unlock all stages in the USA or PAL versions of Super Smash Bros. Melee:
- Open Options > Configuration.
- In the General tab, check Enable Cheats.
- Right-click Super Smash Bros. Melee in the gamelist and select Properties.
- In the Gecko Codes tab, check Unlock All Characters and Stages.
- Launch Super Smash Bros. Melee.
To answer your question specifically, I tested the "Unlock All Characters and Stages" Gecko Code in Dolphin 5.0-14344 on 4 different versions of Melee: USA 1.00, USA 1.01, USA 1.02, and PAL with empty save files and confirmed all stages were unlocked as expected. It's possible an older version of 5.0 may have had a bug preventing the cheat from working.
I suggest simply downloading a file with the game complete. You can use the 20XX Hack Pack for this or by downloading a completed game file.