Christopher Maddix has the best guess, as he couldnt lose.

ALL the 16 robots have the letter T in their name.

Heres the proof

raging knighTmare
Tornado
danTomkia
graviTy
sainT agro
x-TerminaTor
Tough as nails
bulldog breed Three
muTe
firesTorm five
The grim reaper
sTorm Two
Thermidor Two
Typhoon Two
aTomic
m Two