MASTERPIECE STRIPES, NIGHTSTALKER, ENEMY & WINGTHING
Series - Masterpiece
Size/class - N/A
New/remould/redeco - Night stalker is new, Stripes is a remould of MP Ravage, Enemy and Wingthing are redecos of MP Frumble and Ratbat respectively
Wave - MP-15/16E
Released here - No (TakaraTOMY Mall exclusive, January 2018)
Approximate Retail Price - 10,800JPY (about AU$125)
Approximate Sizes - varies (see individual descriptions)
Allegiance - Autobots and Decepticons
Alt-modes - Cassette tapes
Main Features/Gimmicks - can be stored in MP Soundwave's chest. Wingthing can attach to MP Soundwave or MP36's arm
Main Colours - varies (see individual descriptions)
Main Accessories - Enemy has 2 guns and 2 piledrivers, four cassette cases

I only got the Decepticons so someone else will have to review the Autobot Cassettes -- although I have seen/handled the Autobots so I'll type up my overall thoughts about them later. Too tired to write reviews now but I have translated Enemy's tech specs bio. I'll translate the others later.