Here's how all the countries are looking at the moment, correct me if I'm wrong:
US/Canada (Walmart exclusive): Series 1 (Bags 1-18), 2 8-Packs, 8 3-Packs, Collector's Playwheel (Series 2 coming out very soon)
UK: Series 1 (Bags 1-18), Collector's Playwheel (Series 2 coming soon)
Australia/NZ: Series 1 (Bags 1-18), Series 2 (Bags 19-37), Collector's Playwheel
Japan: Series 1 (Bags 1-18) (Series 2 coming this month)
US/Canada (Walmart exclusive): Series 1 (Bags 1-18), 2 8-Packs, 8 3-Packs, Collector's Playwheel (Series 2 coming out very soon)
UK: Series 1 (Bags 1-18), Collector's Playwheel (Series 2 coming soon)
Australia/NZ: Series 1 (Bags 1-18), Series 2 (Bags 19-37), Collector's Playwheel
Japan: Series 1 (Bags 1-18) (Series 2 coming this month)