NBA is very cheap on the Mexican store hence the post for the non-Aussie Nintendo eShop.
Earthworms is the same price in the US eShop or Canadian eShop.
Earthworms Mexico: https://www.nintendo.com/es_LA/games/detail/earthworms-switc…
Earthworms US: https://www.nintendo.com/games/detail/earthworms-switch/
Earthworms Canada: https://www.nintendo.com/en_CA/games/detail/earthworms-switc…
Depending on what you have to pay methods to buy vary.
IMO best one is to make a Mexican account, make a new Paypal account and link the two together (for some credit cards you can pay directly using a credit card). That should work.
Also use a VPN set to Mexico when paying.
Alternatively, you can make a Mexican account and then get credit for the account by buying a Mexican gift card online.
Enjoy!
Incredible