LEGO® Sonic the Hedgehog™ - Shadow's Mech vs. G.U.N. Trooper 77120

The LEGO Sonic the Hedgehog Shadow's Mech vs. G.U.N. Trooper (77120) is a 374-piece battle set containing two opposing builds: a mech piloted by Shadow the Hedgehog, and a G.U.N. Trooper to fight it. It was released in August 2026 as the larger of the two LEGO Sonic sets in that wave.

Two builds, one confrontation

Unlike a single-vehicle set, this one is designed around a matchup. Both machines are built to a similar scale so neither dominates the other on the floor, and the play is driven by staging the fight rather than by any one feature.

Shadow appears as a minifigure and sits in his mech's cockpit, so the character is not permanently locked into the machine.

What is included

• Shadow's mech with an open cockpit
• G.U.N. Trooper mech
• Shadow the Hedgehog minifigure
• 374 pieces split across the two builds

Where Shadow fits in the Sonic range

Shadow is one of the most requested characters in the LEGO Sonic line, and mech sets have consistently been among the theme's stronger sellers because they combine a buildable vehicle with a poseable figure. This set delivers both sides of a fight in one box, which is unusual at this price.

The LEGO Builder app supports the build with 3D instructions, zoom and progress tracking.

Set specifications

• Set number: 77120
• Piece count: 374
• Theme: LEGO Sonic the Hedgehog
• Minifigures: Shadow the Hedgehog

Who this set suits

Best for a Sonic fan who already has a few sets and wants opposition for them, rather than as a first purchase. It pairs directly with 77119 Tails' Tornado-1, released the same day, if you are building out the range.

Two children, two builds

Because the box contains two separate machines, the build can be split between two people working from the same instruction booklet. That makes it a reasonable choice for siblings, where a single-vehicle set often means taking turns.