Looking for the following:
Abra Magic Guard spitback (either gender, but in Quick Ball if female)
Female Joltik Spitback in Quick Ball
Gligar spitback with immunity (either gender)
Female Larvitar spitback, any (useful) nature, with Stealth Rock and Pursuit
I can offer spitbacks of the following:
Jolly Magikarp (Dive Ball)
Gastly (Dusk Ball, Disable)
Honedge (Dusk Ball)
Noibat (Quick Ball)
Fletchling (Repeat Ball, Gale Wings)
Azumarill (Dive Ball, Huge Power, Aqua Jet, Belly Drum)
Mawile (Ultra Ball, Intimidate, Fire Fang, Seismic Toss)
Chansey (Heal Ball, Bold, Seismic Toss, Aromatherapy)
Ralts (Nest Ball, Timid, Trace, Disable, Destiny Bond, Memento, Mean Look)
Skarmory (Impish or Careful, Drill Peck, Brave Bird, Whirlwind)
Corphish (Dive Ball, Adamant or Jolly, Aqua Jet, Knock Off, Dragon Dance)
Absol (Premier Ball, Justified, Naïve, Baton Pass, Play Rough, Faint Attack)