Pokémon Mystery Dungeon: Explorers of Time and Explorers of Darkness/Chapter 18: Lapras

When the chapter first starts your partner and you talk about the Hidden Land. Then when they look at the sunset a pokemon swimming across the sunset, and they don't know what the pokemon could be. But at night you get to figure out the pokemon. If you didn't before, its Laparas. Then you see Laparas and the guild master, Wigglytuff, talking about how they met and a promise about the Hidden Land. Then you wake up from the guild and when the whole guild gets together they notice Wigglytuff is not there. However, they still take out there plan to head to the Hidden Land without the guild master. Then the guild forces Chatot to lead the guild on the mission. After that, you head through Brine Cave and when you reach the halfway point, Team Skull comes to take your partner's Relic Fragment. So in the other half of the cave you have to stop team Skull before they get into the Hidden Land before you. After you get your partner's fragment back, the bad bandits Chatot was talking about come out to fight you, after knocking Chatot out.

Boss Battle Alert!

 * 1) Kabutops       HP: Around 700
 * 2) Omastar(2)    HP: Around 100

This boss battle is quite easy, if you have grass type moves at your disposal. If not, water and electric will do good too. Have sleep seeds at the ready. It is suggested that you are at Level 37 before heading into this fight.

After you beat them, you get ready to go in the Hidden Land, and then that's the end of the chapter.