There was a topic of this, posted long time ago. But it missed most of Margatroid and Exshadow's Stages, that are now offline.
So, i took the justice to put together a new collection, re-uploading all the offline stuff, and added some more that was undiscovered.
Click the link below the image preview to download and enjoy!
Section 1 - Stages by Boomer
Boomer is a Chinese author known for converting few characters from Ougon Musou Kyoku series, such as Battler, Lucifer and Ronove.
All of his stages are specifically made for Mugen 1.1 engine and requires OpenGL to run. Zoom are included as well.
BG 01
(1.1 Only/640x480)
Download
BG 01 (Meta)
(1.1 Only/640x480)
Download
BG 08
(1.1 Only/640x480)
Download
BG 09
(1.1 Only/640x480)
Download
BG 10
(1.1 Only/640x480)
Download
BG 16
(1.1 Only/640x480)
Download
Section 2 - Stages by ExShadow
ExShadow made few nice conversions of OMK stages around 2012, but like all of his older stages, they are deleted from their hosting sites.
Inner Balcony
(Winmugen+ & 1.0/640x480)
Download
Delusion
(Winmugen+ & 1.0/640x480)
Download
End of The Universe
(Winmugen+ & 1.0/640x480)
Download
Cultural Festival
(Winmugen+ & 1.0/640x480)
Download
Cultural Festival (Meta)
(Winmugen+ & 1.0/640x480)
Download
Garden
(Winmugen+ & 1.0/640x480)
Download
Pirate Ship
(Winmugen+ & 1.0/640x480)
Download
Section 3 - Stages by Margatroid
I could say that his stages are the best conversions all around. All of his stages could alternate between Normal and Meta World versions.
Separate def files also included for those who wanted Normal mode only or Meta World only.
Aquarium
(Winmugen+ & 1.0/640x480)
Download
Boiler Room
(Winmugen+ & 1.0/640x480)
Download
City of Books
(Winmugen+ & 1.0/640x480)
Download
Cathedral of Witches
(Winmugen+, 1.0 and 1.1/640x480)
Download (Win+ & 1.0) // Download (1.1)
1st Twilight
(1.1 Only/1280x720)
Download
Garden [Beta]
Download
The Golden Room
Download (Win+ & 1.0) // Download (1.1)
In The Search of Magic
(Winmugen+ & 1.0/640x480)
Download