what makes you keep thinking therell be dual type moves is it a rumor or is it backed up by something(and do not say glow punch is what backs the idea up)No I dont think we know for sure.
People were trying to guess from the sound effect and the fact that it did a ton of damage.
I'll see if I can find a video.
EDIT:
It cut away to a different shot when HP was yellow and falling.
But there's also a HUGE level imbalance it seems so much can't be gleaned.
It's mostly a hunch that Glow Punch is the real Fire/Punch and dual-typed moves will work that way.