Kirbycides are also a possibility. But I think the thing you have to worry about the most are his dair->fsmash combo, his grab combo, and his dair gimping. His dair's got pretty good vertical range (one of his biggest hitboxes, IMO), and as a previous Kirby player (although I still use him sometimes), I tend to spam it.
Always keep in mind that if you try to persue him with a uair for the kill, he will want to either time a good air dodge or slightly get out of your uair range and Stone you.
Also, his aerial Hammer is his brand-spanking new kill move, and it's decently fast, but has a bit of lag if he doesn't DJ before landing, so you might want take advantage of things like that and punish.
Good luck!