Ah yes, Monster Rancher! Did play it but I'm not sure if I ever completed it, definitely not on the level of min-maxing but the way you trained your monsters (and how you had to insert a CD to spawn a monster) had an interesting system in my recollection. Yeah, I'd love to see someone like you play it! Not sure if many people know what to build though, since the franchise has faded into obscurity 😂