Already speaking of Diddy, how do we play that MU exactly? Because until now Ive been going into this MU without a gameplan which has not been helping me out so far xD
I personally think it is best to throw the bananas away because once the bananas are gone diddy doesn't do well against luigi. But luigi just has to watch out for side b grab since that move is pretty annoy especially when used right because after the grab diddy is put in the air and can pull out a banana while luigi is in his animation after he got hurt from side b.
If you want to get in unfortuanely due to luigi's slow air speed or floatyness cyclone helps in getting against diddy. I guess you could also Z catch to instant throw because it is a better option than use cyclone to get in since diddy can hit luigi out of his cyclone with a banana.
Other than that using the bananas against a GOOD diddy kong is pointless because they will catch the banana and it's hard to use bananas in a useful way for luigi.
When you get diddy offstage force diddy to use his barrels so you can either edge hog him or cyclone through his barrels.
Also if you want to what you can do with bananas is that if you have one throw it on the ground and if diddy throws a banana at you shield it or catch it. Note that the first banana you just threw is in your control now so diddy will trip on it if he tries to walk over it.
The best thing to do here is to mix the bananas or put your banana near diddy's banana that he has control over. Even if the diddy player knows which banana is his he still has to get through you to get it. So do your best to bait diddy into get control of his bananas and hit him if he tries to get them.
^ this may sound stupid to read or like when this kind of thing is put on paper, but when you see happen before your eyes it actually works. I've been in this situation so many times.
Last thing if you're in the situation on the ledge where diddy has one banana near the ledge preventing any jump land on stage, getup on stage, or cyclone onto stage. Also diddy has a banana in his hand and is shooting peanuts so that they fall over the ledge what you do is airdodge onto the stage. You airdodge onto the stage because you'll grab the banana and you'll be on the stage and once you're in this situation put up your shield to avoid getting hit by a banana and falling back on the ledge.