He is kind of the easiest character in the game to play and understand. Plus, his loop is incredibly easy to do and set up.

So essentially the basic combo you want to do is A, B.

Standing A comes out so fast that is works in essentially any scenario.
Additionally, it's and easily covers a ton of space. It's so massive and fast that it often catches people by surprise. When that happens you hit them with the standing B. It's a very basic combo that serves two purposes:
1) It pushes them against the wall
2) This is literally the loop

Once you see your opponent bouncing off the walls, that's when you know it's looping time.
There's actually a couple of loops once you reach the wall. Here's a couple that worked for me.

Medium
Standing A, Standing B (repeat) Definitely the most effective and can rack up to 1/4th of your opponent's health before they are able to escape.

Easy as ♥♥♥♥
Forward A (repeat)
Dash (no really) (repeat)

Not as good but get the job done if you're unable to execute the first.

Repeat process until opponent is dead.

He can do his grapple move, then cancel that to his super grapple, then do a hcb B to a standard combo for literally 60-70% of the opponent's health.

Just good luck pulling it off in an online match.