I was just sent this message from @Vraieliss:

Heya - been working on getting a Monster Rancher 2 Any% run recorded and finished, but having to emulate and the resources given Kato file doesn't work at all with Mednafen. I found that the PSX game "C- Contra Adventure" does give a Blue Kato too though different starting stats. Wasn't sure best place to try to note that for others...