I couldn't find much on this, but knew some OG gamers would have a wealth of knowledge on how to utilize the training cave of our mansion in Celia city.
I've already upgraded everything I can with the credits, including the teleporter to the daycare, and I have the incubator. Also, got the Ditto.
I have found one trainer in Celia that gave me a power plus item for HP, so I have that one and the SP Defense one we get.
However since we can't catch the Pokemon in the different caves we own, and they're level 5, what do we use them for? How do we get the most out of our mansion in that regard? How are other players utilizing their caves?