The twelfth and final boss of Vs. Mode. She can only be fought on HARD and up. Her power exceeds even that of Thanatos'. Cordelia is the true mastermind of the all the trouble that befell the world of Popples! She takes pride in her great strength, but she also holds a great secret...

In Tetris Attack, Cordelia is replaced by Bowser.

Fun fact: Her voice line is literally just Seren's except slowed down.

Another fun fact: If you have played Panel de Pon, than you'd know Cordelia and Bowser share one thing in common.