Baby Rosalina Tour

The Baby Rosalina Tour was the thirteenth tour of Mario Kart Tour, which began on March 11, 2020 and ended on March 24, 2020. It was the first tour to be named directly after a character, and the second tour to introduce only one spotlight driver: Baby Rosalina in a detective outfit, while Waluigi (Bus Driver) returned from the London Tour as the spotlight driver for the second week. Additionally, Rosalina was made available as the third Super spotlight character after the Mario Bros. in the Mario Bros. Tour. London Loop was once again the featured course of the tour through the new course London Loop 2, a reference to the fact that, a famous fictional detective, is based in London. This tour also introduced 3DS Rainbow Road's R/T variant. The menu's background featured the Big Ben and some buildings from the London Loop courses as the landmark for this tour, which was reused from the London Tour. This was the first tour to feature four R/T classic courses instead of three.

Starting with this tour, the player can earn Grand Stars to unlock free pipe launches from the first pipe in addition to Tour Gifts. Grand Stars are also no longer required to unlock cups; there are now only twelve cups, the first seven of which are available from the start and can be played in any order, while the other five cups are locked by the usual availability timers.

A datamine of the game revealed a string in its files containing emergency_firstTour in relation to the Baby Rosalina Tour. It was later determined that emergency_ is a prefix for in-game news items that open automatically upon launch.

This tour also marks Hammer Bro's debut in the game in the Vs. Mega Hammer Bro bonus challenge, which makes him the first to appear in a Vs. Mega bonus challenge without being a playable character and was added as a playable character in the next tour. This was also the first tour to feature only one Vs. Mega bonus challenge instead of two.

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
During the Baby Rosalina Tour, each of the following pipes held 50 items instead of 100.

Profiles

 * Mario Kart Tour Twitter:
 * "The Mario Bros. Tour is drawing to a close. Starting Mar. 10, 11 PM PT, the Baby Rosalina Tour kicks off in blue. We're returning to the foggy streets of London! Rumor has it there's a new costume for our featured petite princess…"
 * "It's time for the Baby Rosalina Tour! Return to the storied streets of London (but watch out for the Chain Chomps!) and enjoy twists and turns on courses spread out over 12 cups."

Trivia

 * Hammer Bro, who appeared as the opponent in the Rosalina Cup's bonus challenge (marking the first instance of a driver appearing without being playable), could be seen in a Pipe Frame within Baby Rosalina (Detective)'s magnifying glass in the splash art and the trailer for the Baby Rosalina Tour, hinting at the tour that followed this tour, the Hammer Bro Tour.
 * When the tour began, the English Mario Kart Tour Twitter account accidentally uploaded the Japanese trailer for the introductory tweet. The English version of the trailer was later added in a correction tweet.