LINE: Disney Tsum Tsum

LINE: Disney Tsum Tsum is a mobile game developed by based around the Disney Tsum Tsum line of merchandise. This is a list of all Kingdom Hearts property added to LINE: Disney Tsum Tsum during collaboration events.

Kingdom Hearts
The Kingdom Hearts event ran in February 2019 in Japan and May 2019 internationally. In this event, players completed in-game missions to collect stars and close Keyholes to various Worlds. The playable Tsum Tsums of KH3 Sora, King Mickey, Ansem, and Xemnas were introduced during this event, with the international version also introducing the  characters Emperor Palpatine and Darth Maul. The event included seven worlds: Traverse Town, Wonderland, Agrabah, Atlantica, 100 Acre Wood, Never Land, and Hollow Bastion. The app icon and homepage for LINE: Disney Tsum Tsum also changed to depict Kingdom Hearts characters for the duration of this event.

During the same time period, there was also a separate side event named Kingdom Hearts Score Challenge. Rather than having new worlds and missions, it challenged players to get the highest score using specific Tusm Tsum. There were three groups of Tsum Tsum that qualified for the event: Sora, Kairi, and Riku in Group A; King Mickey, Aqua, and KH3 Sora in Group B; and Shadow, Xemnas, and Ansem in Group C.

Kingdom Hearts: Battles in the Tsum World
The Kingdom Hearts: Battles in the Tsum World event ran in September 2022 in Japan and March 2023 internationally in celebration of the 20th anniversary of Kingdom Hearts. In this event, players would travel to various worlds to cleanse them of Shadows. The playable Tsum Tsums of of Sora & Roxas, The King KH3 Ver., Dark Riku, Axel, and Naminé were introduced during this event. The event included six worlds: Destiny Islands, The Land of Dragons, Hollow Bastion, The Pride Lands, Olympus, and the Keyblade Graveyard. The app icon and homepage for LINE: Disney Tsum Tsum also changed to depict Kingdom Hearts characters for the duration of this event.