Sonic The Hedgehog

Knuckles vs. Dr. Eggman Egg Crusher Mech

A stompy little mech fight that punches above its price tag.

Brick Rated Score

3.9/5

Set 77005 · 2025

Pieces350

Minifigs2

Year2025

Set number77005

Check price on Amazon

Affiliate link. We may earn a commission at no extra cost to you.As an Amazon Associate we earn from qualifying purchases.

The verdict

I like this one for exactly what it is, a quick, punchy battle set built around one gimmick done well.

Eggman's Egg Crusher has a catapult arm that actually launches Knuckles clean off his feet, and the first time it worked I laughed out loud. It is not a deep build and it will not hold a serious collector's attention for long, but for the price it delivers a real play moment, a strong villain figure, and a hero minifig fans have been waiting on. Get it for a Sonic fan who wants to reenact a boss fight on their desk, not for someone chasing part count value.

Best for: Sonic game fans and kids who want a quick, punchy desk battle rather than a long build

The full review

What it is

I will be honest about what pulled me in here, it was not the parts list, it was the fight itself. Dr. Eggman is stuffed into a hunched, crusher armed mech that looks like it walked straight out of a boss battle, and Knuckles stands opposite it ready to punch back. The set's whole reason for existing is that catapult arm, and it works. Load Knuckles onto it, trigger the lever, and he actually goes flying. That kind of honest, mechanical play feature is rare in a set this size, and it is the difference between a toy that gets played with and one that gets shelved after the first build.

The catch

I do want to be fair about the caveats, because this is not a set to buy if you are chasing a meaty building experience. At 350 pieces it goes together quickly, and a good chunk of that piece count is basic structural brick doing the heavy lifting rather than clever new techniques. Two minifigures is also on the lean side for a set in the 40 to 45 dollar range, so if you are counting cost per fig this one will not come out looking generous. This is a set built around one good idea, executed well, and everything else is in service of that idea rather than trying to be a showpiece.

Who it's for

If you have a kid, or an adult who never stopped loving Sonic, who wants something they can actually act out a fight with, this earns its spot on the shelf. It is also a nice, cheap way to get the Knuckles minifigure without committing to a bigger set. If instead you want a long, satisfying build session or a mech dense with printed detail and unique parts, this is not that set, and I would point you toward the bigger entries in the wave instead.

The parts story

What the build is actually like, and the pieces worth knowing about.

Building this one moves fast. You are not working through long, fiddly sub assemblies, you are putting together a compact mech body and then rigging up the catapult mechanism that is clearly the whole point of the model. The lever and arm setup is simple, a few connected pieces and a launch point, but it is satisfying to click together and see click into place, and there is a genuine little payoff the first time you pull it and Knuckles actually gets thrown.

The best pieces here are the two minifigures rather than any single new mold. Dr. Eggman comes as a proper mech pilot figure hunched inside his cockpit, giving him more presence than a standard minifig would, and Knuckles arrives with his own detailed printing, a figure fans of the games had been asking LEGO for. At a retail price of 44.99 dollars for 350 pieces, the value sits mostly in that play feature and those two figures rather than in a big haul of unusual elements, which is worth knowing going in.

Fun facts

01This set launched August 1, 2025 as part of LEGO's first wave of official Sonic the Hedgehog sets.
02It was designed by LEGO designer Isaac Snyder.
03It carries an official retail price of 44.99 dollars in the US (34.99 pounds, 39.99 euros).
04The set holds a 4 out of 5 average rating from early Brickset reviewers.