I'm assuming this refers to Base Momoshiki since the 2nd form clears this.
They kill him with extremely low difficulty. The Rinnegan's techniques can't be absorbed
I don't think that her paper can be absorbed. I assume that it would be an event similar to Gaara's sand. Momoshiki can't actually damage her and he has no techniques to fend her off, so she wins.
Tobi (No Izanagi/Izanami)
Momoshiki can't touch him even if he does absorb Obito's ninjutsu. Obito wins.
The only way I can see Deidara winning this is if he sets off his bombs prior to them coming into contact with Momoshiki and lets him get caught in the AOE.
Momoshiki simply absorbing the bombs and sending them back seems like the more realistic scenario in how the author would write the fight though, so Momoshiki wins.
The moment Kakuzu fires any ninjutsu, he will be obliterated in return.
Momoshiki being able to force Kakuzu to use his masks is an entirely different matter though. The most he has shown is chakra rods, which can't pierce Domu, so I can't really see him threatening Kakuzu directly.
Orochimaru's jutsu can't be absorbed since he just summons snakes for the most part. Momoshiki gets overwhelmed.
Iron sand can't be absorbed. Momoshiki has no conceivable way of winning this.
I can't see Itachi immediately using ninjutsu against Momoshiki. He would probably start off with shuriken tricks and crow feints. In the event that itachi using something like a fireball against him, he withstands the returned onslaught with his Armored Susano'o & Yata mirror.
After that, he never uses ninjutsu directly against Momoshiki again. Momoshiki isn't going to be straining Itachi in combat since he has no techniques of his own. The match ends with Tsukiyomi.
The moment Kisame uses ninjutsu, he gets obliterated in return. Kisame has no reason to do this with knowledge at least. Kisame can fuse with Samehada in order to ensure a victory.
Hidan has nothing that Momoshiki can absorb. I would guess that Momoshiki would be able to hit him with his chakra rods eventually and immobilize him.
