LEGO 21331 Sonic the Hedgehog: Green Hill Zone: Set Guide

Specifications

Set number	21331
Release year	2022
Piece count	1,125
Minifigures	1
Theme	LEGO Ideas and CUUSOO
Building instructions	Download the instructions on lego.com

Where to buy set 21331

View on Amazon View on lego.com

Also on: Amazon.co.uk · Amazon.ca

Price and availability are provided by partner stores and may change at any time.

Affiliate links: this site may earn a commission, at no extra cost to you.

LEGO Ideas set 21331, Sonic the Hedgehog: Green Hill Zone, depicts a scene from the Sonic universe. Released in 2022 under LEGO Ideas and CUUSOO, it contains 1125 pieces and includes 1 Sonic the Hedgehog minifigure.

The model represents Green Hill Zone, a setting closely associated with Sonic the Hedgehog. Within LEGO Ideas and CUUSOO, set 21331 shows how a video game license can be interpreted as a buildable display scene, keeping the subject recognizable while focusing on a compact section of the source environment.

The set is suited to Sonic fans, LEGO Ideas collectors and builders looking for a licensed model that can work for display or simple scene based play. In LEGO Ideas and CUUSOO it sits as a pop culture and video game based entry, rather than a realistic building, vehicle or non licensed concept model.

Inventory of set 21331

The inventory of set 21331 lists 1,125 pieces, spare parts excluded: 287 different lots (one shape in one color) for 163 part shapes. The box also contains 51 spare parts, for small elements that are easy to lose.

Colors of set 21331

Main color: reddish brown, making up 22% of the parts, followed by black (16%) and dark orange (15%).

Color	Parts	Share
Reddish Brown	244	22%
Black	182	16%
Dark Orange	164	15%
Lime	113	10%
Light Bluish Gray	88	7.8%
Red	71	6.3%
Yellow	51	4.5%
Bright Green	47	4.2%
Trans-Clear	21	1.9%
Dark Bluish Gray	20	1.8%
Other colors (23)	122	11%

Part types

Type	Parts	Share
Plates	431	38%
Plates Special	156	14%
Tiles	65	5.8%
Plates Round Curved and Dishes	63	5.6%
Bricks	62	5.5%
Bricks Curved	51	4.5%

Most common parts in set 21331

Part	Color	Quantity
Plate 1 x 1 3024	Dark Orange	110
Plate 1 x 1 3024	Reddish Brown	107
Bracket 1 x 1 - 1 x 1 36841	Lime	31
Bracket 1 x 1 - 1 x 1 36841	Bright Green	30
Brick 1 x 1 3005	Dark Orange	24
Brick 1 x 1 3005	Reddish Brown	21
Plate Round 1 x 1 with Solid Stud 6141	Reddish Brown	20
Plate 1 x 2 3023	Lime	19
Tile Round 1 x 1 Quarter 25269	Lime	18
Plate 1 x 2 3023	Bright Green	15

153 of the 163 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 21331

6 part shapes in set 21331 appear in no other set in the catalog, most often printed elements, stickers or molds specific to the model. If one gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set.

Part	Color
Tile 1 x 4 with Green Pixelated Greenery print 2431pr0177	Lime
Brick Round 2 x 2 Dome Top, Hollow Stud with Blue Glasses print 30367cpr1024	Light Nougat
Minifig Head Special, Sonic the Hedgehog with Black Eyes, Light Nougat Face and Ears, Black Nose and Smile Print 27456pr0002	Blue
Sticker Sheet 2 for Set 21331-1 10001913
Torso Light Nougat Stomach Print, Light Nougat Arms, White Hands 973c02h27pr5927	Blue
Sticker Sheet 1 for Set 21331-1 93691

Rebuilding set 21331 from another set

Share of the parts of set 21331 found in each of these similarly sized sets, counting shape, colour and quantity:

Set	Found	Parts	Release year
75640 The Baratie Floating Restaurant	26%	3,398	2025

No similarly sized set goes above 26%: the model relies on a little-shared assortment, most of which has to be gathered piece by piece.

Size of set 21331 within its line

With 1,125 pieces, set 21331 ranks #43 out of 94 LEGO Ideas and CUUSOO sets in our database, which have an average of 1,279 parts. Among the 483 sets released in 2022, it ranks #58.

Included minifigures

Sonic the Hedgehog, Light Nougat Face, Black EyesQuantity : 1

Frequently asked questions

How many pieces does LEGO set 21331 Sonic the Hedgehog: Green Hill Zone have?

LEGO set 21331 Sonic the Hedgehog: Green Hill Zone has 1,125 pieces. It was released in 2022 as part of the LEGO Ideas and CUUSOO theme.

What year was LEGO set 21331 released?

Set 21331 Sonic the Hedgehog: Green Hill Zone was released in 2022 and belongs to the LEGO Ideas and CUUSOO theme.

Which minifigures are included in set 21331?

Number of minifigures in LEGO set 21331 Sonic the Hedgehog: Green Hill Zone: 1. Their names and quantities are listed in the “Included minifigures” section.

Where can I find the building instructions for set 21331?

The instructions for LEGO set 21331 Sonic the Hedgehog: Green Hill Zone can be downloaded free as a PDF from the official lego.com website, under “Building Instructions”, by entering the number 21331.

What is the main color of LEGO set 21331?

Reddish brown, with 244 out of 1,125 pieces, or 22%. Next come black (16%) and dark orange (15%).

How many different parts does set 21331 contain?

Set 21331 has 287 different lots (one shape in one color), covering 163 part shapes. Most common part: Plate 1 x 1 in dark orange, with 110 copies.

Does LEGO set 21331 contain any exclusive parts?

Yes: 6 part shapes exist in no other set, for example: Tile 1 x 4 with Green Pixelated Greenery print.

Which similarly sized set contains the most parts from set 21331?

Set 75640 The Baratie Floating Restaurant, released in 2025: it supplies 26%, counting shapes, colors and quantities.