Help needed for Mario Strikers Battle League Mixed Channels

[ninetalescommander]

my first guess is that G is ambient occlusion

the other three are unclear and it'll be hard to guess without you just trying stuff and seeing what seems right; here are some possibilities:

• specularity intensity
  
• specularity sharpness (roughness)
  
• team colour modifier
  
• glow/emit
  

Yeah, I am in agreement about Ambient Occlusion being the G Channel as when I first saw it I instantly thought of that. It's the others that are really throwing me for a loop because anything I've tried in Blender just looks wrong.
If you'd like, I can share the .BLEND file so you or anyone reading can have a go yourself.