Update: King Boo also confirmed!

Update – Sun 20th Oct, 2019 22:45 BST: The Mario Kart Tour Twitter account has now also confirmed King Boo will be making his royal entrance in the upcoming Halloween tour.

Read the full article on nintendolife.com

Original source: http://www.nintendolife.com/news/2019/10/after_losing_his_keys_luigi_is_finally_ready_to_race_in_mario_kart_tour_this_halloween