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The Nightmare is a dungeon that cannot be entered after completion. It has seventeen floors, and the Pokémon cannot be recruited.

Pokémon

• Meowth LV 5 (1F-11F)
• Jigglypuff LV 5 (1F-12F)
• Skitty LV 5 (1F-17F)
• Spoink LV 13 (1F-11F)
• Cleffa LV 13 (1F-12F)
• Wynaut LV 14 (1F-12F)
• Mime Jr. LV 14 (1F-11F)
• Whismur LV 16 (1F-17F)
• Clefairy LV 42 (1F-12F)
• Miltank LV 47 (1F-17F)
• Blissey LV 47 (1F-17F)
• Espeon LV 47 (1F-17F)
• Swalot LV 47 (1F-17F)
• Croagunk LV 47 (1F-17F)
• Wobbuffet LV 48 (1F-17F)
• Lickitung LV 48 (1F-17F)
• Spinda LV 48 (1F-13F)
• Persian LV 47 (5F-17F)
• igglybuff LV 14 (6F-17F)
• Lickilicky LV 49 (10F-17F)
• Happiny LV 13 (12F-17F)
• Grumpig LV 50 (12F-17F)
• Wigglytuff LV 44 (13F-17F)
• Clefable LV 44 (13F-17F)

Items

• Blinker Seed
• Dough Seed
• Drop Eye Seed
• Quick Seed
• Sleep Seed
• Slip Seed
• Warp Seed
• X-Eye Seed