This is when Bowser kidnaps Peach and take her hostage, Mario and Luigi goes on an adventure to look for Bowser's Castle.
There are 8 new worlds in this game and there are warp whistles are hidden in World 1 and 2. There are some Mushroom Houses which there is a 3 in 1 chance of finding warp whistles.
Database match: Super Mario Bros. 3 (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: A03E7E526E79DF222E048AE22214BCA2BC49C449
File CRC32: 85A79D9C
ROM SHA-1: A611B90B4833B20A364BF06EE3BE3B9093EA4DF9
ROM CRC32: A0B0B742