No verified guide currently shows a fight with Nubert in Chapter 5, and the available Chapter 5 walkthroughs only mention the Trashy Trio as an optional boss trio in Top Bakery if you recruited all enemies from Chapter 2.

What the current guides say

  • Nubert is not listed as a Chapter 5 boss in the Chapter 5 boss/location guides.
  • The optional trio fight described by current guides is Ball, Trashy, and Nubert in the Top Bakery, and it is only available if you carried over a save with all Chapter 2 recruits.
  • One guide says that fight is “just for fun” and does not affect story completion.

Practical answer

If you are asking how to trigger that encounter, the only documented requirement I found is to continue on a save where all Chapter 2 enemies were recruited.

If you are asking how to win it, no reliable public guide in the results provides a real move-by-move strategy yet, so the safest answer is that this looks like an optional, lightly documented fight rather than a standard story boss.

What to do next

  • Check the Top Bakery area after meeting the Chapter 5 requirements.
  • Make sure your save includes the full Chapter 2 recruit route.
  • Treat any “Nubert solo fight” claims as unverified unless they match a full walkthrough or footage.

SORRY, FAILED