Now this. THIS is what I love to see in the modding community! Wrenchy247 has been working on some mods for Kingdom Hearts 3. In this work in progress video, the boss character Xemnas is replaced by General Scales. He's also using his other mod, Replacing the Elemental Encoder Keyblade with Krystal's Staff. So you get Sora, fighting with Krystal's Staff, against a very competent and powerful General Scales. They both fly around everywhere, trading blows. The voice acting Xemnas is also pretty close to General Scales.
This is epic! Can you imagine a battle between Fox or Krystal and General Scales with mechanics like this? Perhaps if Wrenchy247 does a Sora replacement mod we will get to see it.
The mod is still a WIP, but you can use the Krystal Staff Mod right now.