In the later dungeons, the difficulty is increased by the existence of traps, which may affect your stats, inflict damage, and simply mess up with your items. There are a total of 17 traps:

Pic:	Name:	Effect:
	Bug Switch	Induces sleep on Pokémon that steps on it
	Chestnut Switch	Causes spiky chestnuts to fall, inflicts 10 fix damage on the Pokémon that steps on the trap
	Drop Hole	Pokémon that steps on trap falls to the next floor, other team members will faint even with the Resurrect Seed
	Explosion Switch	An Electrode explodes to inflict damage on all Pokémon in the immediately surrounding 20 squares. Break walls, and wipe out items
	Fan Switch	Sends Pokémon blasting against wall in any direction, causes damage unless holding Passthrough Scarf or is a ghost Pokémon
	Glue Switch	Randomly disables one of the held items or item in bag until you leave the dungeon
	Grimer Switch	Turns one food item in your bag into a Grimer Food
	Imprison Switch	Disables one attack until changes floors
	Mud Switch	Randomly decreases one stat by 1
	Poison Sting Switch	Induces poison on Pokémon that steps on it
	Pokémon Switch	Changes the wild Pokémon or items in the same room
	Self Destruct Switch	A Voltorb self-destructs to inflict damage on all Pokémon in the immediately surrounding 8 squares, also breaking some walls and wiping up items
	Skill Drop Trap	Reduces one random attack's PP to 0
	Slowpoke Switch	Slows walking pace of Pokémon that steps on it
	Spin Switch	Induces confusion on Pokémon that steps on it
	Summon Switch	Causes several wild Pokémon to appear. Trap disappears afterwards
	Warp Trap	Warps to another part of the floor