This Rom hack will change the sprite of the main playable character into Mai Valentine. The color palette has also been changed in order to give the player a more unique look. Aside from this everything else in the game has remained untouched.
If anyone is interested in learning about how this was done, there was a video posted on the author's channel (on 20/07/2020) talking about the process behind this. The channel is named
https://www.youtube.com/channel/UCKawzqE9L4f4PzcEcPU3Erw.
Database match: Yu-Gi-Oh! - The Sacred Cards (Europe) (En,Fr,De,Es,It)
Database: No-Intro: Game Boy Advance (v. 20180816-092117)
File/ROM SHA-1: 9A23AD34F67AC1F1343B7009F11AC95C77B782EF
File/ROM CRC32: D19DB37C