2005 Dancing Man Dollar mule
The Australian 2000 $1/10c mule is well known, having been discovered in the early 2000s. A number of other similar errors have since come to light - 2014, 2015 and 2020 - although their provenance is almost certainly illegally smuggled out of the Royal Australian Mint. $1 coins with double rims due to off-centre strikes are not uncommon, so most double rims are disregarded as double strikes due to the very low probability of a mule occurring in another year.
A 2005 Dancing Man $1/10c mule was reported in the April 2025 Independent Coin News, having been discovered by collector Brendan Alves (Andrews, https://www.independentcoinnews.com/April_2025.pdf). Currently only a single well-circulated example is known, but no doubt others will come to light as news of its existence spreads.