Dakpo I'm still dubious about ROB, but I do agree with bacon being effective whilst he is in the air. On the ground it is hard with his SideB back again.
I'm going to be super brief/vague and may not be that helpful
Zard: He's big, respect his dash dance and try to interrupt it with bacon. Combo him hard because he has fairly slow aerials that can escape combos.
Ganon: Don't get hit, always be on edge. Wiz Kick goes straight through bacon and on no/poor DI can take stocks concerningly early. Do not get grabbed try to space safe bairs.
DK: Don't get grabbed and harass from a distance. Respect his dash attack be prepared to shield. When he's off stage he should be advanced dead. Combo him like the above two.
Link: If the Link is good pick a different character.... Try your best to duck under and powershield his projectiles. Bair can eat most of his projectiles and do not get grabbed or it's either a guaranteed KO or juggle city. DI behind him, it's the hardest spot to react to for his dthrow.
Mewtwo: It's hard to recover against him. Float gives him the ability to cover a lot of our ledge options. Bacon can make moving around hard for him because his movement is kind of awkward and slow + his big tail is a liability. Try to combo him hard, but watch out his nair is fast. Try to cover his teleport options while he is off stage, yif you notie patterns place a meaty hitbox where he likes to go.
Ness: I don't have much experience in this. Bucketting his PK Fire is good now, use a full bucket to one hit KO him. We can go even with him in neutral and bacon can be put out faster than PK Fire. Don't be lazy and always SDI his PK Fire/Fair, this will escape a lot of combos. I believe the best DI for his dthrow is in front of him so he can only get fair which you can SDI.
Kirby: Bacon a lot because Kirby can't do much. Jab > dtilt will kill incredibly early. Kirby's moves all lose to GnW's moves and he gets sent really far. You won't be comboing him incredibly hard, be patient, especially at the ledge and just repeatedly hit him until he is dead.