Okay.
Platform camp on smashville all day with the power of platform cancelling.
Plank on the ledge with a percent lead with the dolphin slash instant-regrab, Diddy has nothing to avoid it.
If he moves in close enough within range, you easily can fair him on reaction.
best banana defense is:
sh/fh z drop retreating fair (regrab banana if feasible)
This is a defensive and walling manoeuvre though. You can't do this if diddy is in range of his forward air. Because if he is, it will hit you.
This is primarily good for covering dash to shields, dash grabs and dash attack.
Cross ups are important. His options to cover this aren't... too bad, but they're not standard play for most diddies (glide toss backwards/ glide toss downwards moving backwards). Back air is readily able to punish a cross over if it isn't well spaced/fast falled/predicted.
Baiting fairs from diddy is good.
Because even though its guaranteed to hit you,
if for some amazing miracle it doesn't
Go to town with any move you want. Ftilt is pretty easy in this regard.
Avoid getting grabbed.
This is like diddy's only real option against marth other than fair when he doesn't have a banana.
