Roy is the hardest CPU to beat, I don't really have much advice other than use short hopped back airs, down airs and look for Roy's patterns.
BTW I just remembered if you double jump backwards with C.Falcon and do a F Punch at the top of the second jump cpus will usually walk in to it.
Thnx a whole lot,
I beat Event Match 49!!!
But now I have to beat Event Match 51...
This'll take a while...
I think I need help again...