I managed to transfer and merge all the Minecraft worlds that I have been able to play since 2012, and that includes my Xbox 360 worlds, my PS3 worlds, my Nintendo Switch survival house, and other villages from survival servers on Java Edition that I played with my friends. This task was not easy, as some of these worlds were thought to be deleted 100% from my Xbox 360, but by some miracle, 10 years later, I managed to get back "Mega Karnia"... I will cherish this moment as an epic achievement in my life.

Programs used: je2be, Horizon, and MCA Selector (for merging Java worlds)