Nothing will ever be worse than Holiday 2015 from Nintendo:
Mario Tennis: Ultra Smash is rated 'Weak' after being reviewed by 46 critics, with an overall average score of 56. It's ranked in the bottom 11% of games and recommended by 0% of critics.
opencritic.com
That whole year was horrific for the Wii U, with the single exception of Spatoon:
- Animal Crossing: amiibo Festival
- Art Academy: Home Studio
- Devil's Third
- Fatal Frame: Maiden of Black Water [Also known as Project Zero: Maiden of Black Water]
- Kirby and the Rainbow Curse [Also known as Kirby and the Rainbow Paintbrush]
- Mario Party 10
- Mario Tennis Ultra Smash (2015 for Japan)
- Pokkén Tournament (2015 for Japan)
- Super Mario Maker
- Splatoon
- Tokyo Mirage Sessions #FE (2015 for Japan)
- Xenoblade Chronicles X
- Yoshi's Woolly World