Pokémon Diamond and Pearl/The Lost Tower

There is really only one reason you need to go here, and that is for HM04:. There are a few other items here, but the trainers are fairly weak, so grab what you need, battling the trainers along the way. On the fifth floor you will see two old ladies. One will give you HM04: Strength. The other lady will give you a Cleanse Tag. This item, when held by your lead Pokémon, reduces wild Pokémon encounters by 50%. You're done here for now, so go ahead and head on out!

Items

 * HM04:Strength: Talk to a lady on the fifth floor to receive HM04.
 * Revive: There is a Revive in the bottom left-hand corner of the third floor.
 * Cleanse Tag: Talk to a lady on the fifth floor to receive the Cleanse Tag.
 * Oval Stone: This is in the middle of the second floor, right in front of the trainer.
 * TM 27 (Return): This is near the middle of the bottom side of the fourth floor.