This patch mostly reverts the World Map screen layouts back to the way they were in Super Mario All-Stars. Namely, World 6-5 (rather than 6-4) must be cleared once again to get to the second Toad House in World 6. The borders and additional details were not changed, though.
Database match: Super Mario Advance 4 - Super Mario Bros. 3 (USA)
Database: No-Intro: Game Boy Advance (v. 20210227-023848)
File/ROM SHA-1: 69E81F41394F02D64CAD206ADB26B3CD43690770
File/ROM CRC32: A44BA79F
Database match: Super Mario Advance 4 - Super Mario Bros. 3 (USA, Australia) (Rev 1)
Database: No-Intro: Game Boy Advance (v. 20210227-023848)
File/ROM SHA-1: 532F3307021637474B6DD37DA059CA360F612337
File/ROM CRC32: 88DAB27F