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Bandai HG 1/144 Mercuone Unit fitted to a Core Gundam (sold separately) in a flying pose on a clear Action Base, dark blue armour on the arms, legs and head with grey fins and yellow and red chest details. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit on its own round display stand in a compact aircraft-style form, dark blue and grey parts with a green visor and no Core Gundam fitted. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit package artwork (box art): Hiroto's Support Unit shown with an underwater blue theme, the Gundam Build Divers Re:RISE logo and a note that the Core Gundam is not included. Official Bandai box art.
Bandai HG 1/144 Mercuone Unit fitted to a red and white Core Gundam variant carrying large weapon packs, on a clear Action Base. The weapons and the Core Gundam are sold separately. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit worn by a Core Gundam with wing-like extra parts and a large lance, posed on a clear Action Base. The extra parts and Core Gundam are sold separately. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit in a fighter-like flight form with white wing parts and a long lance, viewed from above. The white wing and lance parts are from other sets sold separately. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit fitted to a Core Gundam (sold separately) in a flying pose on a clear Action Base, dark blue armour on the arms, legs and head with grey fins and yellow and red chest details. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit on its own round display stand in a compact aircraft-style form, dark blue and grey parts with a green visor and no Core Gundam fitted. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit package artwork (box art): Hiroto's Support Unit shown with an underwater blue theme, the Gundam Build Divers Re:RISE logo and a note that the Core Gundam is not included. Official Bandai box art.
Bandai HG 1/144 Mercuone Unit fitted to a red and white Core Gundam variant carrying large weapon packs, on a clear Action Base. The weapons and the Core Gundam are sold separately. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit worn by a Core Gundam with wing-like extra parts and a large lance, posed on a clear Action Base. The extra parts and Core Gundam are sold separately. Official Bandai photo.
Bandai HG 1/144 Mercuone Unit in a fighter-like flight form with white wing parts and a long lance, viewed from above. The white wing and lance parts are from other sets sold separately. Official Bandai photo.

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Bandai 1/144 HGBD:R Mercuone Unit

$17.99 AUD
Hiroto's underwater-combat support unit from Gundam Build Divers Re:RISE, in 1/144 HG: armour and frame parts for the Core Gundam plus a display stand. Snap-fit, rated 8+ by Bandai. The Core Gundam is sold separately.
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Key features
  1. Underwater-combat armour: a new armour form for the Core Gundam from Gundam Build Divers Re:RISE.
  2. Core Docking Custom compatible: Bandai lists it as compatible so it can combine with other parts.
  3. Stand in the box: a round display stand is included, so the unit can sit on its own.
Returns & Refunds
  1. Australian Consumer Law Compliance: Mecha Express Australia strictly adheres to the Australian Consumer Law for all transactions.
  2. Contact Process for Issues: If you encounter any issues with your purchase, you should first contact Mecha Express Australia via email at support@mechaexpressaustralia.com.au, describing the problem and providing photos and contact details.
  3. Response and Advice: Mecha Express Australia will promptly respond to your email to discuss the issue and advise on the next steps.
  4. USA Customer Policy: USA customers are not eligible for returns, refunds, or compensation for any issues including lost, stolen, or incorrectly delivered items.
  5. Return Conditions for AU and NZ: Items must be returned in their original, undamaged, and resalable packaging if requested by Mecha Express Australia.
  6. Refund and Replacement Policy: Australian and New Zealand customers may receive replacements or refunds for reasons like change of mind (before dispatch with a restocking fee), incorrect items, lost/stolen/damaged parcels during delivery, missing parts, or inability to supply an item. Mecha Express Australia will give you a Reply Paid number for you to return these items at no cost to you at your local Australia Post outlet.
  7. Non-refundable Items: Items that cannot be refunded include those that are opened, used, partly assembled, lost parts, self-damaged items, or items found with no issues.
  8. Duplication Promise: Returns are accepted if you receive a duplicate gift, provided the item is returned in resalable condition and at your own expense.
  9. Pre-Order Cancellation: While pre-order refunds are typically not offered, requests will be considered but subject to a 10% restocking and administration fee.
  10. Restocking and Administration Charge: A 10% fee applies to canceled orders or refunds to cover non-refundable third-party fees, calculated on the total value of the products and shipping costs.
Series Assembly Guide FAQ

Bandai 1/144 HGBD:R Mercuone Unit

Mercuone Unit: Hiroto's underwater support unit in 1/144 HG

From Gundam Build Divers Re:RISE, the Mercuone Unit is a new set of armour parts for the Core Gundam, built for underwater combat. It is Hiroto's support unit, and Bandai's pitch is simple: swap your Core Gundam into a new form and give your HGBD:R collection another configuration.

The Core Gundam is not included. This is the armour and frame parts only, so you need a separate HGBD:R kit that contains a Core Gundam to wear it.

Build difficulty

Bandai rates the set for ages 8 and up and it is a snap-fit build, so nippers are all you need to get started. That lines up with Skill Level 2 on our scale.

Technical highlights

The set comes as exterior parts and frame parts, and Bandai notes it supports Core Docking Custom, so you can combine it with other parts. Because the units are separate pieces, you can remove the parts and use them with a Core Gundam from a different kit. Bandai's photos also show the unit on its own on a small round stand, in a compact aircraft-style form.

What makes this kit special

  • Underwater-combat armour: a new armour form for the Core Gundam from Gundam Build Divers Re:RISE.
  • Core Docking Custom compatible: Bandai lists it as compatible so it can combine with other parts.
  • Stand included: a round display stand is in the box, so the unit can sit on its own.
  • Blue and grey colour separation: moulded in the unit's blue and dark grey colours.

What's in the box

  • Exterior parts (1 set)
  • Frame parts (1 set)
  • Stand (1)
  • Instruction manual

Compatible kits

It is designed for any HGBD:R kit that contains a Core Gundam, such as the Earthree Gundam, Venustwo and Marsfour sets. The Core Gundam and the extra weapons and parts you see in some of Bandai's photos are sold separately and are not part of this set. A clear Action Base, which Bandai's photos use for the flying poses, is also sold separately.

Build specifications

  • Series: Gundam Build Divers Re:RISE
  • Line: HGBD:R (HG Build Divers:R) #17
  • Scale: 1/144
  • Manufacturer: Bandai
  • Retail box weight: 180 g (box 29.8 x 19 x 4.7 cm)
  • Barcode: 4573102588760
  • Skill level: Skill Level 2 (Bandai age 8+)
  • Assembly: Snap-fit, nippers used to cut parts from the runners
  • Release: Bandai Japan, February 2020

Perfect for

  • Fans of Gundam Build Divers Re:RISE who already have a Core Gundam
  • Builders who like to swap armour configurations on the same base kit
  • Collectors completing the HGBD:R Core Gundam line

Fast Australian shipping

Dispatched same day from Brisbane if ordered before 2pm AEST on weekdays. Free shipping Australia-wide on orders over $199. Genuine Australian stock in hand, not ordered through an overseas proxy. Packed securely in a sturdy outer box with water-soluble cornstarch void fill that dissolves cleanly in the sink.

What to watch for

  • No Core Gundam in the box: Bandai's box art says the Core Gundam is not included. Check you have a Core Gundam kit first.
  • Weapons are separate: the weapons and extra parts in some of Bandai's photos come from other sets and are sold separately.

Build notes

Snap-fit, no glue needed. Keep nippers and a fine file or sanding stick handy for tidying the gates where parts leave the runner.

Last updated: 14 October 2026 (AEST)

Build Divers Series

Immerse Yourself in Adventure: Gundam Build Divers Unveils a New Dimension of Gunpla Building & Battling! Dive into the exhilarating world of "Gundam Build Divers," where Gunpla building meets virtual MMO gameplay in the expansive Gunpla Battle Nexus Online (GBN). This series takes the physical battles from "Gundam Build Fighters"...

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Build Divers Series

Assembly Guide

SKILL LEVEL REQUIRED
Skill Level.2 Basic modeling skills are required. Parental supervision may be required for younger children. These kits are generally suitable for beginner builders. A basic set of modeling tools are required including nippers, hobby knife, sanding sticks/paper, file, and tweezers. No glue is needed for the general assembly. Parts will need to be removed by using a pair of nippers and cutting the part away from the runner. Parts may require clean-up where they were removed from the runner.
No Cement Required

Gunpla (plastic model kits) are a snap together assembly and do not need plastic cement to complete. We always recommend having some plastic cement handy as a part of your modeler's tool kit. If you prefer to fix your model in a particular pose then plastic cement will work. Plastic cement is also perfect to use if a joint is loose. Apply plastic cement in a single thin layer and allow it to dry completely before test fitting. Re-apply more cement if necessary.

No Painting Required

Gunpla (plastic model kits) are designed to be built and displayed without the need for painting. Kits are molded in different colours replicating the colours of the actual mecha from the Mecha series. A technique called colour separation, where multiple parts of the model are molded in different colours on the same sprue is also used. Mecha kits often include stickers or water-slide decals that can be applied to the model to enhance its appearance. Some Gunpla kits come with pre-painted parts or parts with pre-applied details, such as metallic or translucent finishes.

Many modelers still choose to paint their kits to customize and add further detail. Painting allows for more creativity and personalization, enabling modelers to achieve unique effects, weathering, and colour schemes that may not be available out of the box. However, the kits are designed to be enjoyable and visually appealing even without painting, making them accessible to a wide range of hobbyists.

Frequently Asked Questions

What are the different grades of Gunpla, and how do they differ?

Q: What are the different grades of Gunpla, and how do they differ? A: Gunpla kits come in various grades, including Entry Grade (EG formally FG) High Grade (HG), Master Grade (MG), Perfect Grade (PG), Real Grade (RG), and Super Deformed (SD). Each grade varies in size, complexity, articulation, and detail, with PG being the most detailed and largest among standard models, while SDs are chibi-style representations of Gundam mobile suits.

How do I start with Gunpla building if I'm a beginner?

Start with an EG, HG or SD kit, as they are simpler and require minimal tools. Alternatively choose one of Mecha Express Australia's customised beginner boxes. Ensure you have a pair of plastic nippers and, optionally, a hobby knife and fine grit sandpaper. Follow the instruction manual, cut parts carefully from the runners, and piece them together. Over time, you can advance to more intricate models and detailing techniques.

Do I need to paint my Gunpla?

Painting is optional. Kits come pre-coloured, so painting is primarily for those who want to customize or achieve a specific look. If you decide to paint, acrylic or enamel hobby paints are recommended, along with proper priming.

How can I make my Gunpla look even more realistic?

Techniques like panel lining, using decals, weathering, and top-coating can enhance the realism of a kit. Panel lining emphasizes details, decals add logos and warnings, weathering gives a battle-worn look, and top-coating seals everything with a matte or glossy finish.

Are there limited edition or rare Gunpla kits?

Yes, Bandai regularly releases limited edition, event-exclusive, or special coating versions of kits. These can be more challenging to find and might be pricier than standard releases. Collectors often seek these kits for their uniqueness. Common names included:- P-Bandai (premium Bandai), Gundam Base Limited, and Event Limited

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