Ronin R.E.X.

Notable parts

• 9 parts appear in only a few other sets: Hat, Conical Asian Style (Dark Red) — also in 70592 Salvage M.E.C. (all Ninjago); Brick Wedged, Sloped 4 x 4 Triple, Stud Notches (Dark Green) ×2 — also in 31031 Rainforest Animals, 21301 Birds; Wave / Flame Rounded Double with Axle with Marbled Yellowish Green Pattern (Dark Blue) ×2 — also in 70738 Final Flight of Destiny's Bounty, 70730 Chain Cycle Ambush (all Ninjago); Weapon Scythe / Crescent Blade Serrated with Bar (Yellowish Green) ×2 — also in 70732 City of Stiix, 851342 Ninja Army Building Set (all Ninjago); Brick Wedged, Sloped 45° 6 x 4 Double / 33°, 5 Bottom Tubes [Train Roof] (Dark Bluish Gray) — also in 76041 The Hydra Fortress Smash, 76300 Arkham Asylum; Wave / Flame Rounded Single with Pin (Yellowish Green) — also in 70730 Chain Cycle Ambush, 70744 Airjitzu Wrayth Flyer (all Ninjago); Engine / Air Scoop 2 x 2 (Dark Red) ×4 — also in 70144 Laval's Fire Lion, 70706 Crater Creeper, BIGBOX The ultimate battle for CHIMA; Propeller 3 Blade 13 Diameter (Pearl Gold) — also in 70590 Airjitzu Battle Grounds, 70741 Airjitzu Cole Flyer, 70644 Golden Dragon Master (all Ninjago); Windscreen 12 x 6 x 6 Curved without Pin Holes (Trans-Clear) — also in 70815 Super Secret Police Dropship, 70709 Galactic Titan, 70724 NinjaCopter, 8097 Slave I.
• 6 parts are otherwise only found in Ninjago sets: Brick Special 2 x 4 with Pin Holes and Flywheel Socket [Airjitzu] (Black); Gearwheel 8 Tooth with Pin Holes and Flywheel Recess (Ninjago) [Short Shaft] (Black); Hat, Conical Asian Style (Dark Purple); Minifig Neckwear Bandana (Ninjago) (Dark Red); Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard] (Yellowish Green); and 1 more.
• 16 moulds first came out in 2015, including in this set: Technic Pin Connector Round 1L [Beam] ×2; Wave / Flame Rounded Double with Axle with Marbled Yellowish Green Pattern ×2; Brick Special 2 x 4 with Pin Holes and Flywheel Socket [Airjitzu]; Creature, Ghost, Skreemer Mask with Mouth Lopsided with Pointed Teeth Print; Gearwheel 8 Tooth with Pin Holes and Flywheel Recess (Ninjago) [Short Shaft]; and 11 more.
• 16 existing moulds first came out in their colour in 2015, including in this set: Brick Curved 2 x 1 No Studs [1/2 Bow] (Dark Blue) ×2; Brick Curved 2 x 2 x 2/3 (Dark Green) ×2; Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate (Reddish Brown) ×2; Brick Wedged, Sloped 4 x 4 Triple, Stud Notches (Dark Green) ×2; Tile Special 1 x 2 with Two Vertical Teeth / Tooth (Yellowish Green) ×2; and 11 more.

Calculated from Rebrickable’s public set inventories, excluding sticker sheets and spare parts.