Question,can I give Ryu other gifts from Son Goku, ones that may or may not have been available to Roku, we just never saw them. One would be a green-fire, which I would call Wildfire, that harder to extinguish and increased strength as Son Goku was said to have these two abilities. The fire was only used once on canon, didn't state that it had those properties, but itgot me thinking while I was coming up with jutsus(which is haed when you have make sure they're not OP), and strength because why not. If Matabi can offer flexiblity, then I'm pretty sure Son can offer strength.