yes onto YI now:
shall i start?
defining features:
large, tilting platform
small main stage
high, thin blast zone
uneven surface on main platform and ledges which dip down.
'the ghost'
in my opinion, this is a bad stage for r.o.b. the small platform makes it a lot harder to camp properly and the stage isnt long enough allow a fulyl charged gyro to stop on it unless you fire it into the tilted plotform which can leave you open for a free attack. also the platform covers msot of the stage which means its easier for opponents to hit your base. the ceiling is fairly high so your nair/usmash kill EVEN later than normal because r.o.b primarily kills vertically.
also you have the ghost, which is the small platforms which occasionally come up for about 5 seconds on the side of the stage, although its pretty random, it can screw you over big time, because you could think youve gimped that falco, but then suddenly boom, the ghost pops up and practically gives the falco his stock back, and making your hard work wasted.
on the other hand...
youre f/b-throws become pretty valid kill moves if you holding them on the edge, and your b-air becomes your only real kill move, and seeing as its got possibly the longest lasting single hitbox in the game (wait, i forgot lucario's up smash) its going to work well for you, seeing as teh side blast zone is closer than on all of the other neutral's, you will be using f/b-moves to kill, which measn you usual best friend (the n-air) can be used for racknig damage, which is one thing its very good at along with the dsmash.
i still thikn that those plus point pale in comparison to the bad points of this stage
character i would take here:
falco
Dedede
pikachu (maybe)
fox
sonic
pit (for the sole reason he cant go under the stage and grab the opposite ledge)
samus
characters i would avoid playing here:
Snake
Diddy kong
Marth
Olimar
G&W
Toon Link(youve all seen that d-samsh gimp, sure it dosent work on us but it puts us in a bad position)
Kirby
Donkey kong
Wolf
Sheik
Not sure:
Everyone else
...
i think that works for the starter, people add/correct stuff on that, my r.o.b knowledge isnt exactly amazing