Quick mirror match notes
-Nitro Grab can interrupt Abby Punch, HK Slam, and Nitro Flip if you armor the first hit.
-cr.MP or cr.Vroom is an easy way to piss off another Abby. Nothing can beat them at that range, and if he jumps, you get an extremely good setup with AA st.LP xx Nitro Grab.
-Nitro Flip is stupid punishable. Not sure if you can land a good Heavy attack, but you can punish with either of Abby's command grabs. Don't use this move unless you're fighting a zoner.
More general notes
-st.LP xx Nitro Grab is a busted AA. Nobody jumps from the grab. It's an easy 250dmg/330 stun.
-I think st.HP is safe at range. Couple that with the CC VT-cancel jump-in, and you have yourself some bait to go fishing with.
-If your opponent is high on stun or in the corner after a knockdown, just keep rushing them down with Nitro Charge and use the grab two or three times, followed by a Nitro Punch.
-cr.MK xx Nitro Charge is a really weird looking cancel that is sure to get some guaranteed Nitro Grabs for the first week or so.
-cr.HP xx Heavy or EX Abby Punch seems to be the best ender to EX command grab. Just note that you don't get an ender in the corner, and you have to delay the EX cancel to land it after crouch fierce.