Pokémon: Diamond and Pearl · Battle Dimension arc
DP090 · Ghoul Daze!
放課後はゴーストタイム！？
Synopsis
What happens.
While Ash and his friends are at the Pokémon Summer Academy, their third lesson is on how to correctly approach Ghost Pokémon, when ever and where ever they encounter them. They are paired up to find a hidden medal in the Summit Ruins.
Synopsis adapted from Bulbapedia's DP090 entry, used under CC-BY-NC-SA 2.5.
Story arc · DP053-DP104
Battle Dimension.
Continues the gym challenge; Dawn enters Sinnoh Contests. Team Galactic's plot escalates; Mt. Coronet research begins. Includes the Pokémon Origins-style Spear Pillar setup.
Read the full Diamond & Pearl guidePokémon featured · 12
Who appears.
Linked entries open the species page on the Pokédex. Items without a sprite (alternate forms, regional variants, generic group references) fall back to a name pill.
More from this arc
Other episodes in Battle Dimension.
Episode synopsis from Bulbapedia, CC-BY-NC-SA 2.5. Editorial context (arc affiliation, cultural moments, character signatures) hand-verified May 2026. Pokémon, character names, and series titles © Nintendo, Game Freak, Creatures Inc., The Pokémon Company, OLM Inc. This is an unofficial fan reference.