The Dark Star was a artifact from Mario and Luigi: Bowser's Inside Story and the normal counterpart of The Dark Star X. It was recovered by Fawful and used Bowser's DNA to turn into Dark Bowser. After Bowser defeated Dark Bowser and Mario and Luigi defeated the Fawful bug or the Dark Star Core, The Dark Star was saved by its X counterpart and Dark Bowser came back to seek revenge on Mario and Luigi, who beat him. In OiramOiram12345 and the Dark Star X, it was revealed that Dark Bowser was The Dark Star all along even between the events of M&L:BiS and his merge with OiramOiram12345, Bowser X, The Dark Star X, and the combined power of the dopples to create Dark Bowser X. After him and Fawful lost to Mario, it merged with The DSX and OO to create OiramOiram12345 X. OO12345 X was defeated by MM54321 X, and the DSX and the Light Star X became Star X, before they split up.