After 3-month development Super Mario Bros 3.: The Forgotten Worlds has now been released as a Famicom Disk System hack as well! In case somebody doesn’t know it yet, it is an unofficial expansion pack and sequel to Super Mario Bros.: The Lost Levels including a new character called Kevin (who is Mario’s and Luigi’s dream brother), 9 brand new worlds, new (and 1-2 resurrected) graphics, and many other features never seen in the previous two Super Mario Bros. games.
Big thanks to 4matsy for helping and code supplying, thanks to doppelganger for the SMB2J disassembly! And thanks for Szemigi for his enthusiastic effort that has been put into the project.
Also, this would be the first SMB2J hack that was created with doppelganer’s SMB2J disassembly.

http://www.romhacking.net/hacks/5222/