Random thought; what if Waluigi and BWD were added in a free update in March 2020, and came with the following:
- Additional stages
- Rainbow Road
- PAC-Maze
- Additional Mario Kart songs
- Baby Park
- Ribbon Road
- Tick-Tock Clock
- Moo Moo Meadows
- Coconut Mall
- Wario's Gold Mine
- DK Jungle - Mario Kart 7
- Music Park
- Piranha Plant Slide
- Neo Bowser City
- Hyrule Circuit - Mario Kart 8
- Big Blue - Mario Kart 8
- Additional Kirby songs
- Vs. Nightmare
- Factory Inspection
- Ripple Red
- Checker Knights
- Dark Meta Knight Battle
- Dedede's Royal Payback
- The Greatest Warrior in the Galaxy
- Meadow Breeze
- Vs. Grand Doomer (Super Ability) / Another Dimension
- Sullied Grace
- Vagrant Counting Song of Retrospection
- Dededestroyer Z
- The Apple Juice Song
- Song of Supplication
- Vault Boy Mii Costume
- WoL Very Hard mode
- Individual stage hazard toggling
(okay i don’t hate the series, it just isn’t my cup of tea. more power to you if you like it)