S

Scorponok (G1)
Scorponok, scorpion mode
Scorponok (G1) and Zarak
Scourge and Cyclonus
Sharkticon, shark mode
Shockwave
Sixshot, robot mode
Sixshot, weapon mode
Sixshot, winged wolf
Slugfest and Overkill
Soundwave
Skywarp

T

Thrust
Thundercracker is transformed into Scourge

U