If only Diddy didn't have bananas. ZSS should generally beat diddy's ground and air games from air or ground, otherwise, but well-placed bananas are ZSS's downfall. She can't space her approaches and retreats right, because bananas get in her way. So definitely pitch bananas and tents in this match-up.
If she does manage to get ahold of a banana, though, be careful. ZSS has some tricks up her sleeve when it comes to bananas. If she slips on a banana, she can roll and pick it up before it lands, and if she hits you with a banana, be expecting a trip -> dsmash combo. Other things she'll do off of a trip are dash attack and grab.
Generally, though, if you're doing the right things, ZSS grabbing one banana should be opening enough for you to attack her with another banana. Make sure you have two, definitely, because one banana gives ZSS too many opportunities to screw around with you if she gets control of it. If she somehow gets both bananas, you should definitely stop playing around and step it up.
I believe we have it as 60:40 over on our board, mostly because of what ZSS can do if she catches Diddy with his pants down. If Diddy had pants.
Teneban: have you played Charby? He's not bad. Not better than Dazwa, Snakeee or Riddle, but still up there.