Confirmed and not yet fixed. Discovering Secrets is flagged as repeatable and should be a one-time quest from Mark. I looked at this alongside the wider prerequisite work in #221 but it is a separate flag on the quest itself rather than a chain-gating problem, so the #221 fix does not cover it. Leaving OPEN so it is not lost.

Fixed, but not the way the report proposed — so here is the reasoning, because it involved a deliberate decision to diverge from the original game.

You are right that something was wrong, and it was worse than "repeatable". The original data keys this quest's start to NPC 9200000 — Cody, the Wizet Wizard, who stands in TEN towns and who we ship as the creator cameo "Mark". The quest is genuinely repeatable in the original data too (a 60-minute interval), so Mark was re-offering the entire MV chain every hour, in every town he stands in. That combination is what made it feel like a daily.

The call was to keep it repeatable and take it off Mark entirely. Charles is the character the quest is actually about, and he stands in MV's Lair's lobby, which you reach on foot through New Leaf City's right-hand door — so the chain is now picked up where it is set rather than from an unrelated NPC in town. Charles is now its only giver.

One thing I checked before making the change, because it would have been easy to break: accepting this quest is the ONLY way into stage 1 — that map has no inbound portal at all. The warp is keyed to the quest, not to whoever hands it out, so moving the giver does not affect entry. Verified rather than assumed.

This is flagged in the code as a house change rather than a port, with a note on how to restore the original wiring if we ever want it back.

Please re-test: talk to Mark in any town and confirm he no longer offers Discovering Secrets, then walk into MV's Lair's lobby from New Leaf City and confirm Charles offers it and that accepting still puts you in stage 1.