Another simple graphical hack, this time with edited text as well. Play as an Eevee instead of Mario (and Luigi is replaced with a shiny Eevee). Based on the "Mr. Mary" title screen hack, but the patch is intended for the regular Mario Bros ROM.
Database match: Mario Bros. (World)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 9286A2DB471D51713E9B75E68B47FFBF11E2D40B
File CRC32: A6DE1B55
ROM SHA-1: BF43D93D36D7198E65B9B7C4E41DB108FE43FCBA
ROM CRC32: C4C3949A