Jab: Luigi
FTilt: Sheik
DTilt: Either Ryu's, Kirby's, Donkey Kong's, or Ike's
UTilt: Bowser
DashAttack: Meta Knight's or Ike's
FSmash: Little Mac (includes the 2 angle-able's, too)
DSmash: Rosalina (Luma would appear for the duration of just the DSmash alone, then disappear when the DSmash is over; assume the same conditions if and when I bring up Rosalina again)
USmash: Rosalina
NAir: Villager
FAir: Sheik
BAir: Bowser
UAir: Rosalina
DAir: Rosalina
ZAir: Zero Suit Samus
B: Lucario's "Piercing Aura Sphere" (includes influence from aura-scaling)
SideB: Mario's "Gust Cape"
UpB: Villager's "Explosive Balloon Trip"
DownB: Either Zero Suit Samus' default "Flip Jump" or Ryu's "Focus Attack"
Grab: Luigi
DashGrab: Captain Falcon
PivotGrab: Olimar (Same as with Luma, just assume one pikmin appears for the grab, and disppears as soon as the grab either finishes whiffing or the entire grab-routine is completed)
Pummel: Whoever's has the highest DPS, I think Jigglypuff's or Kirby's if I remember
FThrow: Donkey Kong
BThrow: Ness
DThrow: Luigi
UThrow: Charizard
SpotDodge: Whoever has the best 2-frame spot dodge, I can't remember...Mewtwo? (Dark) Pit? I don't know
ForwardRoll: Little Mac
BackwardRoll: Sheik
AirDodge: Mewtwo
*Edit: Oops, missed that part in the original post. Don't mind me