P$ in Deltarune Chapter 5 are the pink coins used to buy the mystery key, and you need 10 of them to access the secret-boss route. A recent guide lists 19 total pink coins across Garden, Cliffs, Castle East, Castle West, and Castle Top, with the key purchase happening once you’ve reached 10 coins.

Fast answer

  • Go to the areas where pink coins spawn and collect them as you progress.
  • The quickest route is usually to follow a coin-location guide rather than hunting randomly.
  • After you have 10 P$ , buy the mystery key and continue toward the pink door route.

Main locations

The guide breaks the coins into these zones: Garden (1–4) , Cliffs (5–8) , Castle East (9–15) , Castle West (16–17) , and Castle Top (18–19). It also gives specific warp points for each coin, such as Hopschef and Near Shrine in Garden, First Climb and Shop in Cliffs, and Foyer or Green’s Shop in Castle areas.

What to do

  1. Collect at least 10 pink coins.
  2. Head to the Cliffs shop and buy the mystery key.
  3. Use the key on the pink door to reach the secret-boss path.
  1. If you want everything, keep going until you have all 19 coins.

Note

There’s also a newer walkthrough-style guide that mentions the chapter’s pink coin route and overall progression, so if you want the full collectible path, the all-coins guide is the cleanest reference.

TL;DR: Get 10 pink coins, buy the mystery key at the Cliffs shop, then use it on the pink door. The full chapter has 19 total P$.