The Yu-Gi-Oh! card "Boss Rush", featuring Big Core MK I, Crystal Core, and Tetran.

The Boss Rush is a stage introduced in Gradius II and features bosses from past games, such as Gradius and Salamander. The rush consists mainly of five or more classic bosses, and always at the end, a new original boss from the game itself appears.

Usually, Zub Rush (or Zub Rush MK II) appears as a miniboss at the start of the level to give some power-ups to the player.



The following boss rushes added theme songs for the respective bosses:

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