Hammer Bro Tour

The Hammer Bro Tour was the fourteenth tour of Mario Kart Tour, which began on March 25, 2020 and ended on April 7, 2020. It was the second tour to be named directly after a character. The featured course of the tour was Donut Plains 1 from Super Mario Kart, while also bringing back Bowser's Castle 2 from Mario Kart: Super Circuit, making it the first tour to introduce a new Retro Course since the Ice Tour. Hence the name, the tour marked the playable debut of Hammer Bro (who was originally going to be playable in Mario Kart Wii), Boomerang Bro, Ice Bro, and Fire Bro, in which they also acted as the spotlight characters for the tour. Additionally, unlike the previous two tours, each week's respective pipes reverted to having 100 items in the pipe instead of 50. The menu's background featured the hills from Donut Plains 1 as the landmark for this tour.

A datamine revealed a string containing emergency_secondTour associated to the Hammer Bro Tour. It was later determined that emergency_ is a prefix for in-game news items that open automatically upon launch.

Signature kart sets
Drivers with a corresponding cup in the tour were bumped one rank up in every course of their cup.

Rewards
Gold cells indicate rewards exclusive to Gold Pass members.

Initial pipe appearance rates
In the Hammer Bro Tour, the pipe held 100 items again instead of 50 and held these items:

Profiles

 * Mario Kart Tour Twitter:
 * "The Baby Rosalina Tour is drawing to a close. But don't worry, there's another awesome tour on the way. Starting Mar. 24, 11 PM PT, the Hammer Bro Tour kicks off in blue!"
 * "The Baby Rosalina Tour is almost over. Thanks for racing! Next up in blue: watch out for flying hammers! The Hammer Bro Tour starts Mar. 24, 11 PM PT!"
 * "The tranquil peace of Donut Plains is no more as tires screech and engines roar! The Hammer Bro Tour is here, featuring this infamous foe and his elite crew. Just watch out for angry hammers..."
 * "The Hammer Bro Tour is almost over. Thanks for racing! Next up in blue: everyone's favorite mean green racing machine is here! The Yoshi Tour starts Apr. 7, 11 PM PT!"