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30704 LEGO Sonic the Hedgehog Balkiry Attack thumbnail image

30704 LEGO Sonic the Hedgehog Balkiry Attack
Images 6Description 
30704 LEGO Sonic the Hedgehog Balkiry Attack
  • Balkiry Attack thumbnail
  • Balkiry Attack thumbnail
  • Balkiry Attack thumbnail
  • Balkiry Attack thumbnail
  • Balkiry Attack thumbnail
  • Balkiry Attack thumbnail

LEGO 30704 Balkiry Attack is a Sonic the Hedgehog set currently available at retail for $4.99 and is projected to retire in mid and late 2026. Current new-sealed secondary market prices range from $8 to $13, with the average above MSRP at $5.

Forecast Model

This represents the expected annual growth (CAGR) based solely on a forecast model.
LEGO 30704 Balkiry Attack is a Sonic the Hedgehog Classic Games set released in 2025, containing 42 pieces. It builds a brick-built Balkiry Badnik with a small Clucky companion, with Clucky’s design based on the Flicky-style animal mold seen in prior LEGO Sonic sets. The polybag marks the debut of Balkiry as a physical LEGO build and incorporates notable elements, including a yellow front piece and a red tail element not seen in that color since 2003. In-game, Balkiry is a bird-like Badnik created by Dr. Robotnik (Eggman) that first appeared in Sonic CD (1993), known for aerial attacks and bomb drops.

Once retired, the initial annual growth for the first year will be around 13%, but will level off closer to 11% after the second year, valuing the set between $7 and $8 shortly after retirement.
Retirement risk.Balkiry Attack has been available for 17 months. Based on the average lifespan of other sets in this theme (15 months), this set may be at risk of retiring in the coming months.
All regions

For Sale (New/Sealed)

This chart shows the sales listing trends of 30704 Balkiry Attack.
 (US) 30704 Sonic The Hedgehog Balkiry Attack Polybag Sealed New
BrickEconomy Choice
$6.99
(US) Sonic the Hedgehog Balkiry Attack 30704 Polybag Set 42 Pcs New Sealed $6.99
+40.1%
(US) Balkiry Attack 30704 Polybag 42 Pieces 6+ Sonic NEW, Sealed $6.99
+40.1%
(US) Sonic: Balkiry Attack (30704) $6.99
+40.1%
(US) Sonic The Hedgehog 30704 Balkiry Attack $6.99
+40.1%
(US) Sonic: Balkiry Attack (30704) $7.49
+50.1%
(US) Balkiry Attack 30704 Complete Set 42pcs Sonic Polybag $7.54
+51.1%
(US) Sonic: Balkiry Attack (30704) $7.54
+51.1%
(AU) 30704 Balkiry Attack - Sonic - New with Tag - AU Seller $7.66
+53.5%
(US) New, Sealed LEGO Sonic the Hedgehog Set 30704 - Balkiry Attack paper bag $7.69
+54.1%
(US) BALKIRY ATTACK Sonic the Hedgehog LEGO 30704 Polybag 42 PCS $7.92
+58.7%
(US) Sonic: Balkiry Attack (30704) Sealed New Retired $7.99
+60.1%
(US) 30704 Sonic Balkiry Attack 42 pcs Polybag New $8.00
+60.3%
(US) Sonic: Balkiry Attack (30704) $8.42
+68.7%
Show 26 more listings

Sets in Sonic the Hedgehog / Classic Games

76994 Sonic's Green Hill Zone Loop Challenge

Theme / Subtheme Sonic the Hedgehog / Classic Games
Year 2023
Pieces / Minifigs 802 / 5
Availability Retired
76994 LEGO Sonic the Hedgehog Sonic's Green Hill Zone Loop Challenge
Retail $99.99
Value ~$99.99

77006 Team Sonic Command Truck

Theme / Subtheme Sonic the Hedgehog / Classic Games
Year 2025
Pieces / Minifigs 747 / 5
Availability Retail
77006 LEGO Sonic the Hedgehog Team Sonic Command Truck
Retail $69.99
Available at retail

76997 Tails' Adventure Boat

Theme / Subtheme Sonic the Hedgehog / Classic Games
Year 2024
Pieces / Minifigs 393 / 3
Availability Retired
76997 LEGO Sonic the Hedgehog Tails' Adventure Boat
Retail $59.99
Value $53.73

76992 Amy's Animal Rescue Island

Theme / Subtheme Sonic the Hedgehog / Classic Games
Year 2023
Pieces / Minifigs 388 / 3
Availability Retired
76992 LEGO Sonic the Hedgehog Amy's Animal Rescue Island
Retail $49.99
Value $52.25
Growth  +4.5%
Annual growth 2.8%

76991 Tails' Workshop and Tornado Plane

Theme / Subtheme Sonic the Hedgehog / Classic Games
Year 2023
Pieces / Minifigs 376 / 4
Availability Retired
76991 LEGO Sonic the Hedgehog Tails' Workshop and Tornado Plane
Retail $39.99
Value $95.00
Growth  +137.6%
Annual growth 25.4%

76998 Knuckles and the Master Emerald Shrine

Theme / Subtheme Sonic the Hedgehog / Classic Games
Year 2024
Pieces / Minifigs 325 / 2
Availability Retired
76998 LEGO Sonic the Hedgehog Knuckles and the Master Emerald Shrine
Retail $49.99
Value $40.00

76990 Sonic's Speed Sphere Challenge

Theme / Subtheme Sonic the Hedgehog / Classic Games
Year 2023
Pieces / Minifigs 292 / 3
Availability Retired
76990 LEGO Sonic the Hedgehog Sonic's Speed Sphere Challenge
Retail $34.99
Value $34.16

My Collection

Balkiry Attack Reviews

13 reviews
4.7
Collectors
Investors
BrickEconomy Member Review
“The LEGO Sonic the Hedgehog Valkyrie Attack polybag introduces an exclusive Badnik build with rare parts, like the tail piece in red and a yellow front element. While the design includes creative details such as a flying stand and printed eyes, the inclusion of the Clucky figure feels repetitive given its availability in other sets.”
Bricksfanz
“The previous Sonic miniset ignored minifigures for a focus on a unique buildable Badnik, not featured in a larger set. This trend continues with this little set. The unique Badnik is Balkiry, a bird-like robot, first seen in Sonic 2. There’s an area on the Badnik’s back... More where you can place the Clucky figure. The use of the new curved corner brick for the bird’s beak looks great. I like that the Badnik is unique and not simply a rehash of one found in another set.”
Full review at bricksfanz.com

About Sonic the Hedgehog Classic Games

The LEGO Sonic the Hedgehog Classic Games theme celebrates the iconic video game series from the early 1990s, featuring sets inspired by the original Sonic games released on the Sega Genesis. This theme includes detailed builds and minifigures representing key characters such as Sonic the Hedgehog, Tails, and Dr. Robotnik, as well as iconic locations like Green Hill Zone. Notable elements often include loop-de-loops, palm trees, and collectible rings, capturing the fast-paced platforming and vibrant aesthetics of the classic games.

Classic Games currently consists of 8 sets that as of now has run from 2023 to 2025. As of today, 76994 Sonic's Green Hill Zone Loop Challenge is the most valuable Classic Games set with an estimated new/factory sealed value of $100.
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Action and high-flying adventure await kids as they help rescue the Clucky from the Balkiry Badnik. The set includes a mini Clucky figure and a buildable Balkiry figure.
Description provided by LEGO©