This Rom hack will change the sprite of the main playable character into one of the NPC's from the offices in the building area. The title was named alternate character since this NPC does not have a specific name. 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 Stay Retro.
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