If its any help, the robots in each Annihilator were...

A1 (S4, Northern Annihilator)
Spikasaurus, Stinger, Killerhurtz, Suicidal Tendencies, Dominator 2, Chaos 2.

A2 (S4, Southern Annihilator)
Spawn Of Scutter, Behemoth, Onslaught, Attila The Drum, Razer, Vercingetorix.

A3 (X1, First Annihilator)
Pussycat, Hypno-Disc, Arnold A Terminagger, Splinter, Thermidor 2, X-Terminator.

A4 (X1, Second Annihilator)
Fighting Torque, Panic Attack, Steel Avenger, Napalm 2, Spirit Of Knightmare, Disco Inferno

A5 (X2)
Kan Opener, Major Tom 2, Raging Reality, Revenge Of Trouble And Strife, Thermidor 2, Typhoon 2.

A6 (S7)
Raging Knightmare, Robochicken, Ewe 2, Kan Opener, Flippa, Ripper.