Jump fierce should be good against dudley
Also at certain distances you can make it near impossible for him to jump in with an attack, just space yourself and counter jump ins with c.fierce occasionally. However, if you fuck up the distance it’s probably your ass
Also, if he’s jumping in from hella close, you can chance a walk under -> launch, though if he does jump rh really early, it might hit you in the face.
Also, c.rh is semi-useful against dudley during footsies/after he blocks a c.forward from you. Dudley’s pokes are pretty lacking in distance compared to yours, and ‘occasionally’ you can catch him with c.rh because it hits so far, and it tends to get him if he tries to walk in to position himsef again.
The twins can [IIRC] go under his s.fierce/f+fierce with their low forwards.
It’s better to stay on the ground against him, because if you jump in and he parries whatever you throw out [or if you look for a parry, you risk getting mixed up. Actually you risk getting mixed up by jumping in on him at all], you’re looking at 40ish% stun [parry -> normal -> upper]. Obviously I don’t mean to say never jump in on him, but it’s a lot more dangerous than other people.
Basically, try to limit contesting his jump ins. His jumpins are fucking insane, and the damage you would get from a successful parry -> punish is NOT EVEN CLOSE to what you risk if you fuck up.
If he abuses sweep, look to punish it. Walk back and forth and see if he bites. At the distance someone would think of sweeping, there’s little else that would hit you.