Pretty much what GoblinGamerKid said, The only 3 moves he has that cause a "Lock" state are his Uncharged Shadow ball and B-Air and F-Tilt.
His F-Tilt and B-Air locks only work at low %'s (Below 20%) so they're unreliable, but the uncharged Shadow Ball lock works up to about 350%.
The issue is the setup. You'd assume the best method to setup for the lock is his Side Special, Confusion, since your opponent land on the ground, But your opponent is able act almost immediately after they're hit with Confusion therefor they can avoid landing on the ground. So Its a really unreliable setup. I've only managed to hit one person with the Confusion into Shadow Ball (lock) combo online, but my opponent wasn't very good.
As for the battlefield platform, You can't really follow up with anything. I mean if your opponent doesn't tech then you might be able to follow up with a B-air but I'm not sure. I don't think you'll have enough time. cause I tried it on a computer and they were able to get up with a roll before my move hit, which makes me believe you wouldn't be able to follow up with a B-air against a real player.