Me has:

BT01 - Smokescreen #7 (MISB)
BT01 - Smokescreen #8 (MISB)
BT02 - Sideswipe (MISB)
BT03 - Streak (MISB)
BT04 - Hound (MISB)
BT05 - Dead End (MISB) x 2
BT06 - Yellow Tracks (MISB)
BT06 - Blue Tracks (MISB)
BT07 - Smokescreen #1 (MISB)
BT07 - Smokescreen #2 (MISB)
BT08 - White Meister (MISB)
BT08 - Red Meister (MISB)
BT09 - Swindle (MISB)
BT10 - Grimlock (MISB)
BT11 - Battle Ravage (MIB)
BT12 - Overdrive (MISB) x 2
BT13 - Laserwave (MISB)
BT14 - Wheeljack (MISB)
BT15 - Police Prowl (MISB)
BT15 - Blue Prowl (MISB)
BT16 - Skidz (MISB) x 2
BT17 - Nemesis Prime (MISB)
BT18 - Transparent Mirage (MISB)

Alternator Prowl (MISB)
Alternator Sunstreaker (MISB)
Alternator Ravage (MISB)
Alternator Rumble (MISB)
Alternator Rodimus (MISB) x 2
Alternator Nemesis Prime (MISB) x 2
Alternator Skids (MISB)
Alternator Rollbar (MISB)
Alternator Ricohet (MISB)
Alternator Optimus Prime (MISB)

Total - 38 (41, if including the BTAs)

Do we count Binaltech Asterisks? if yes, then BTA01 (MISB), BTA02 (MIB) and BTA03 (MISB)