“With the Mario Kart Tour multiplayer update at the end of September, we’re adding new ways to play multiplayer,” Nintendo wrote, “and removing Gold Races.
Smartphone spin-off Mario Kart Tour will receive a multiplayer update in September which will add “new ways to play”.
Back in June, files relating to a Battle Mode for Mario Kart Tour were uncovered by dataminers.
This seems likely to be the game’s Battle Mode update, after files hinting to its inclusion were found a couple of months ago.