I can help, but I can’t reliably identify the exact “bulletpattern place” from that wording alone, and the available info only points to broad Chapter 5 walkthroughs rather than that specific room.

What to do

  • In the bullet-hell section, stay near the center first, then move only in short taps instead of holding a direction.
  • Watch for the safe lanes in the pattern; most attacks in these sections are about reading the opening in the barrage, not outrunning it.
  • If the room has moving bars or a wall-style puzzle, wait for the rhythm to repeat before crossing, since rushing usually gets you clipped.
  • If you mean the secret-boss route, the guides suggest it’s tied to hidden collectibles and a key/door sequence rather than a single combat trick.

Fast clarification

Tell me which part you’re stuck on:

  • the castle wall puzzle,
  • a pink-door / key section,
  • or the actual bullet pattern in battle.

TL;DR

The safest general fix is to move in tiny bursts, learn the pattern cycle, and cross only when the gap opens; if you name the exact room or enemy, I can narrow it down using the walkthrough references already surfaced.