The Upside Down

Notable parts

• 7 parts come in a colour no other set has for that mould: Plant, Leaves 4 x 3 (Dark Brown) ×22; Antenna 1 x 4 with Flat Top (Trans-Brown) ×9; Weapon Bladed Claw Spread (Dark Tan) ×2; Wedge Plate 6 x 4 Left (Olive Green) ×2; Hips and Bright Light Blue Medium Legs [Complete Assembly] (Bright Light Blue); and 2 more.
• 3 printed parts are only in this set: Glass for Window 1 x 2 x 2 Flat with Newspapers print (Trans-Brown) ×6; Panel 1 x 2 x 1 with Black Square, White Dots print (Trans-Clear); Tile 2 x 2 with Child Drawing Of Wizard with Gem Print (White).
• 12 parts appear in only a few other sets: Plate Special 4 x 4 with Studs on One Edge [Plain] (Dark Blue) ×4 — also in 75958 Beauxbatons' Carriage: Arrival at Hogwarts; Bar 1 x 3 (Radio Handle, Phone Handset) (Yellow) — also in 77072 Peely Bone; Hair Bowl Cut (Dark Brown) — also in 11385 Star Trek: U.S.S. Enterprise NCC-1701 Bridge; Glass for Window 1 x 2 x 2 Flat with Newspapers print (Tan) ×6 — also in 75978 Diagon Alley, 76403 The Ministry of Magic; Panel 1 x 2 x 1 with Rounded Corners and 2 Sides (Dark Tan) ×4 — also in 41436 Olivia's Jungle Play Cube, 41410 Andrea's Summer Play Cube; Plant, Sea Grass (Black) ×4 — also in 70427 Welcome to the Hidden Side, 70433 J.B.'s Submarine; Plate 8 x 16 (Sand Blue) — also in 71016 The Kwik-E-Mart, 41740 Aliya's Room; Tile 6 x 6 with Bottom Tubes (Tan) — also in 72040 Captain Toad's Camp, 75638 Battle at Arlong Park; Wedge Plate 6 x 12 Right (Dark Tan) — also in 70840 Welcome to Apocalypseburg!, 80044 Monkie Kid's Team Hideout; Tile 1 x 2 with Compass Print (Trans-Clear) — also in 60160 Jungle Mobile Lab, 60161 Jungle Exploration Site, 5004940 City Jungle Minifigure Collection; Plant, Leaves 6 x 5 (Dark Blue) ×22 — also in 76432 Forbidden Forest: Magical Creatures, 71813 Wolf Mask Shadow Dojo, 76458 Thestral Family, 76475 Forbidden Forest: Expecto Patronum; Plate 8 x 16 (Olive Green) ×3 — also in 21160 The Illager Raid, 75968 4 Privet Drive, 21188 The Llama Village, 75980 Attack on the Burrow.
• 8 moulds first came out in 2019, including in this set: Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs ×8; Wedge Plate 6 x 4 Left ×3; Wedge Plate 6 x 4 Right ×3; Brick 1 x 4 x 3 ×2; Hair and Hat, Cap with White and Red Front and Reddish Brown Curly Hair; and 3 more.
• 28 existing moulds first came out in their colour in 2019, including in this set: Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin (Dark Brown) ×28; Plant, Leaves 6 x 5 (Dark Blue) ×22; Plate Round 1 x 1 with Solid Stud (Olive Green) ×18; Tile Special 1 x 3 Inverted with Center Hole (Dark Brown) ×14; Tile 1 x 3 (Sand Blue) ×12; and 23 more.
• 20 minifigure parts with their print are only in this set: Bald Head with Tied Bandanna with Camouflage Print (Black); Creature Legs and Hips with Animal Legs, Tan Claws (Dark Tan); Hair and Hat, Cap with White and Red Front and Reddish Brown Curly Hair (Blue); Hat Cone Drooping with Silver Stars Print (Dark Purple); Minifig Creature Head, Demogorgon with Dark Red Inside, Tan Teeth print (Dark Tan); and 15 more.

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