Super Mario Land 2 is a sidescrolling platforming game for the Gameboy known for introducing the character Wario. Going by input frames, this run is an improvement of 8 frames over the currently published run.
This is the game end glitch category of this game. More details of what happens can be found here.
The primary difference here is in emulation accuracy. The published run is known not to work on console and also desyncs in both the GBHawk core and Gambatte core in BizHawk. This run however syncs in both cores, which are both significantly more accuarte then the old VBA one.
Also, a proper time for this run is 197366495 cycles/(4194304 cycles/sec) = 47.056 seconds.
ThunderAxe31: It's really nice to see an old movie getting improved while using more accurate emulation. The movie length results longer due to the implementation of the bios screen, but actual gameplay is shorter. The fact that the credits sequence lacks the music due to a glitch is not a problem, since the credits sequence itself it's triggered correctly in its entirety from start to end.
Accepting as improvement over the current publication.