Iron Block

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Iron Block
NSMBW Small Metal Crate Render.png
Sprite of a 2×2 Iron Block from New Super Mario Bros. Wii
First appearance New Super Mario Bros. Wii (2009)
Latest appearance Super Mario Bros. Wonder (2023)

Iron Blocks[1] are metal crates found in the New Super Mario Bros. sub-series.


New Super Mario Bros. Wii[edit]

Iron Blocks first appear in New Super Mario Bros. Wii. They are characterized as boxes moved by Conveyor Belts, and they are sometimes infinitely spawned by characteristically defined generators. Iron Blocks come in four different variants, all of which are a combination of widths 2–4 and heights 2–4, and getting crushed by a falling Iron Block results in an immediate loss of life. They appear only in World 4-NSMBW Tower Icon.png, where they are the gimmick of the level.

New Super Mario Bros. U / New Super Luigi U / New Super Mario Bros. U Deluxe[edit]

Iron Blocks return in New Super Mario Bros. U and New Super Luigi U, where their behavior is largely unchanged from New Super Mario Bros. Wii. They appear in Roy's Conveyor Castle in the former and in Roy's Ironclad Castle and P Switch Peril in the latter. Additionally, the 4×4 variant features Bowser's emblem on its visible face.

Iron Blocks retain the aforementioned roles in New Super Mario Bros. U Deluxe.


Names in other languages[edit]

Language Name Meaning
Japanese Box Iron[2]
Tetsu no Katamari
Iron Box

Iron Bundle
Italian Blocco di ferro[4] Iron block


  1. ^ Stratton, Steve. New Super Mario Bros. U PRIMA Official Game Guide. Pages 164 and 165.
  2. ^ New Super Mario Bros. Wii / New Super Mario Bros. U internal filename (box_iron)
  3. ^ Shogakukan. 2015. Super Mario Bros. Hyakka: Nintendo Kōshiki Guidebook, pages 150 and 216.
  4. ^ Super Mario Bros. Enciclopedia, pag. 150, 216