Currently, there isn't one (to my knowledge). I once looked into trying to get my autosplitter (the one that's enabled through LiveSplit's Edit Splits window) to support Bizhawk, but it's much less straightforward than Nestopia or Mesen, due to...reasons that I can't fully articulate. Basically, I'd need a completely different method of finding the RAM addresses that I need than what works for the other emulators, and I neither have a good idea for that right now nor am particularly motivated to try to find one. But if you (or anybody else reading this) think you can help, please hit me up and I'd be happy to chat about it with you!
Effective immediately, any submissions using the SNES9x emulator will not be verified. The SMB1 mod team has concerns about its integrity due to its ability to overclock and remove lag frames, which may not be easily detectable. Additionally, we request that all BizHawk submissions avoid using the S