So it turns out that the code used in Factory Adventure *or* the TPP Anniversary Repository, by all accounts, should not actually work. Like, no, really, it ends up loading 0xFF as code, thus why it would always rst38. It just...doesn't...do anything. My friend Enigami, who figured out the issue, described the function as being "half-finished".
We came up with a solution that results in less functionality - now it needs a free box - but it results in less load times, so maybe it's just better this way. I doubt many people will catch that many Pokemon unless they were shooting for a living dex, which is unfeasible in its current state anyway.
I considered putting Bottle Caps in here, but it felt like making the game too grindy, so I changed it to just be in the Battle Tent shop with a very high price.
This now, technically, works.
However, the Battle Tent was seemingly made with the assumption trainers are Pokemon, which our hack has moved from. I've made it so it can load it as a trainer battle properly, but you will deathwarp. I need to implement a scripted loss system.
This is...most of the stuff necessary for the Battle Tent to work. I've faithfully restored most things so far, including doing a few grammar tweaks.
Main issue is that we get a really strange softlock when the Pokemon selection menu comes up. Not sure why, but point is, it can't progress to the next bit for debugging like this. Committing now to ask for assistance.