Arin's Spinjitzu Battle Mech

The LEGO® Arin's Spinjitzu Battle Mech (set 71839) is a 213-piece LEGO Ninjago set released in 2025, drawn from season 3 of NINJAGO Dragons Rising. The mech features posable arms and legs, a rotating torso, an opening chest cockpit for a minifigure, and two large sword accessories for ninja combat. Body parts can be swapped with the customizable mechs from the 2024 Elemental range — Cole's, Sora's, Kai's, and Lloyd's mechs — to build hybrid creations. Includes Arin with a crystal katana, a Spectral Dragonian Warrior with sword, and a Baby Riyu model for good-versus-evil battles. A modular mech entry point for series-3 fans.