Who is Arin in the Ninjago universe?

Arin is one of the younger ninja characters from the newer Ninjago stories, and in this set he pilots his own battle mech.

How many pieces and minifigures does the set have?

The set has 104 pieces with 60 different elements and includes two minifigures.

Can the mech be combined with other Ninjago sets?

Yes, like many Ninjago vehicles it is designed to fit well into bigger play scenes alongside other sets.

Ninjago

Arin's Battle Mech

Arin's Battle Mech is a 2024 LEGO® Ninjago set that puts the young ninja Arin inside a mobile combat robot. With 104 pieces, two minifigures and 60 different elements, it belongs to the line's handy, single-figure mech sets. Black, pearl gold, bright light orange and magenta give the mech its futuristic, battle-ready look.

Set number: 71804
Year: 2024
Pieces: 104
Minifigures: 2
Theme: Ninjago
Different parts: 60

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 60

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (5)

These extra parts come with the set in case one gets lost.

Minifigures 2

Wolf Mask Warrior, Shoulder Pads fig-0145635 pieces × 1
Arin, Ninja Headwrap fig-0145644 pieces × 1

Alternative models

Fan models by Rebrickable users that you can build (mostly) from this set’s parts. Instructions are available from the designers.

71804 Arin's Battle Flyer 36 pieces by thekitchenscientist

View the idea at Rebrickable ↗

What can I build with it?

Description

A mech built for the young ninja Arin

Arin is one of the newer characters in the Ninjago universe, and here he gets his own battle mech, typically steered through movable arms, legs or a rotating hip section. Two minifigures – Arin and an opponent or ally – allow for direct confrontation scenes, a hallmark of the series. At 104 pieces, the mech stays compact enough for quick play sessions without giving up typical mech features such as weapon mounts or a cockpit opening.

60 elements for movement and detail

The 60 different elements form the mech's movable joints and armour plating, an above-average variety of parts for a set this size. Pearl gold and bright light orange add metallic and fiery accents, magenta brings strong colour contrast, while black holds the structure and joints together as the base tone. This palette is typical of the action-heavy, comic-inspired look of the newer Ninjago series, standing out clearly from the more muted tones of older Ninjago sets.

Building with a clear focus on action

Unlike large display models, this mech is clearly built for play: moving parts, a cockpit for the minifigure and compatible connection points for accessories take priority. With two minifigures, small duels can be acted out straight away without needing further sets, although the mech also combines well with other Ninjago vehicles for bigger scenes. Its compact size of 104 pieces also makes the build easy to plan for a single afternoon. Anyone with accessories from other Ninjago sets can further customise the mech with additional weapons or add-on parts.

Parts list and facts at a glance

104 pieces, 60 different elements, two minifigures, released in 2024 – the parts list on this page sets out these essentials in detail, including every colour and quantity. That is useful for tracking down elements in pearl gold or magenta for other projects, or identifying a missing piece during a rebuild. It means the page works both as a reference for this set and as a starting point for custom mech creations.

FAQ

Who is Arin in the Ninjago universe?: Arin is one of the younger ninja characters from the newer Ninjago stories, and in this set he pilots his own battle mech.
How many pieces and minifigures does the set have?: The set has 104 pieces with 60 different elements and includes two minifigures.
Can the mech be combined with other Ninjago sets?: Yes, like many Ninjago vehicles it is designed to fit well into bigger play scenes alongside other sets.

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