This list is very cool, efforts such as this is what makes this community awesome.
Question though. I noticed that you linked to the Japanese site tkool.jp which I think
is Kadokawa's main site? Well regardless, there are some additional material released there, most interestingly this
pack which looks like a celebration release for reaching 1.000.000 sales for the engine(?). It contains lots of sprites for many of the SF-RTP battler. Really, really nice stuff.
Now, I'll assume it's released by Kadokawa and that it's free to use (even for commercial games), as long as you own and use it in MV of course. But that's only an assumption based on the belief that the site and the resources in question belongs to, and have been release by Kadokawa respectively. As well as my (not perfect) translation of this statement on that download page:
However, I can't go on an assumption alone when fact is that I can't read at a native level - which means I can't be sure. Also, as far as I do understand what's written, it doesn't seem to specifically say anything about what additional credits (if any?) that would be required. When it comes to legal stuff, the devil is always in the details, and I'm also unsure about the details of distribution mentioned. Is it fine to use and distribute (and sell as part of a game)? It doesn't seem to say anything about encryption though so is that maybe not needed? So many questions.
I want to be really, really sure since I might be tempted at using some of those sprites for a game that I might end up selling. Which would mean re-distributing them as part of a commercial product.