I feel he's easy to learn. I picked him up just like PCHU did.
Also, on the stage it's as hard to kill someone as it is to land a dash attack. (Dash attack, to upsmash cancel?)
SO yeah, good comboes that are -easy- to do and I found out for myself within three matches or w/e. (Others know them, of course, but if I found these in a round or two, maybe three.. than you can easily too)
Dash attack with weak, I believe, to upsmash for kills.
Dash attack (weak) to aaaaaaaa to down+b
chain grab, if they can break out of it and you can't master it easily, try attacking them normally and downthrowing. Follow it up with a down+b. If they trip, you can f+smash, D+B again other things.
if you are in the air and do nair, you can land with the (fourth hit?) and press aaaaa to down+b and other things, of course.
nair to aaa to down+b (tripping them) to fsmash is pretty good.
Of course, the chaingrab to spike is the best.
Last thing.. he has laser lock. It's hard to master (in my opinion) and hard to pull it off in tournament matches.