Using a combination of Switch game vouchers and the Coles promotion of 20% off eShop gift cards you can get Metroid Prime 4: Beyond and Pokémon Legends: Z-A for $70 each on Switch 2 (RRP $109.95 each) and $54 each on Switch 1 (RRP 89.95 each).
Note that you need to be a Switch Online member to use the method below, but you can become a member for $5.95, so add that cost to the prices here if that's your situation.
The way it works is this:
Buy at least $175 worth of Nintendo eShop cards from Coles at 20% off ($140) for the Switch 2 versions, or at least $135 of eShop cards for the Switch 1 versions ($108), during the promotional period of 17/9/25-23/9/24.
Using your eShop balance, purchase Nintendo Switch Game Vouchers for $134.95 of eShop credit here or from your Switch: https://ec.nintendo.com/AU/en/pretickets/70020000000141
If buying the Switch 1 versions, use the game vouchers to buy Metroid and Pokemon* and you now have the games for an out of pocket spend of $54 each.
If buying the Switch 2 versions you also need to purchase the Switch 2 upgrade packs for $20 each for each game**, using the remaining eShop credit you purchased earlier, effectively giving you each game for $70 each.
*You can also use this method to buy other first party Nintendo games of your choice for the same price; a full list of applicable games is available here: https://ec.nintendo.com/AU/en/pretickets/70020000000141
**Note that if you prefer not to pay the upgrade fee you can still play the Switch 1 versions on your Switch 2 for the cheaper price, you will just miss the resolution, frame rate and controller upgrades for the new hardware, but the games are effectively the same in other respects.
PS: Nintendo Switch Game Vouchers are being discontinued at the end of January 2026