A secret boss can be encountered after the ending of the final boss cut scenes in Arcade Mode as long as specific conditions are met.
| Boss | How to unlock
|
|---|
| Secret Boss Mu-12 Encounter | Complete Arcade Mode with any character, excluding Noel, without being knocked out and with three or more Astral Finishes.
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| Secret Boss Ragna Encounter | Using Mu-12, beat Arcade Mode without being knocked out and with three or more Astral Finishes.
|
