Niue, a sovereign state in free association with New Zealand, uses two official legal tender currencies. The New Zealand Dollar is the circulation currency for daily transactions, while the government also authorises legal tender coins in the Niue Dollar currency for collector's purposes.
A number of mints issue a large variety of commemorative, bullion and collector coins under the authority of Niue. These coins are dedicated to historical or general popular culture themes not related to Niue itself. Many of them are in standard bullion sizes - for example, two ounces of silver (abbreviated as 2 oz Ag, where "Ag" comes from the Latin word for silver, Argentum).
This coin is part of a New Zealand Mint range of Chibi coins, and features Batman from the DC Comics Series. It is the first two-ounce coin in the collection (the Mint calls it a "mega chibi").
Chibi (ちび or チビ) is a Japanese slang word describing something short (a thing, an animal or a person). The term is widely used to describe a specific style of caricature where characters are drawn in an exaggerated way: small and chubby, with stubby limbs and oversized heads. Coins of this type look like cartoon characters and have their corresponding shape; they are also very thick for their size.
The Mint says about the coin:
Here comes Batman in his Batmobile, speeding onto an awesome 2oz pure silver coin, to celebrate BATMAN Day! As part of our Chibi Coin series, this is the first mega-size coin! The coin has been shaped and coloured to show Batman, with his iconic Batmobile.
Despite its uniqueness, this is still a legal tender coin, with the obverse featuring the Ian Rank-Broadley effigy of Her Majesty Queen Elizabeth ll. Created in partnership with Warner Bros. Consumer Products, this heroic piece arrives nestled in a high-quality case with a large window for display. A Certificate of Authenticity and the coin’s unique number in the limited mintage can be found on the back. This box has then been placed in a click-close acrylic display case - so you can keep this prized collectible in pristine condition. A label reinforcing the coin as a 2022 Batman Day special release is displayed on the front. | 
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