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Fixing Pichu's Ukelele
After you get back to Booker's house, he notes that Pichu has broken its ukelele and sends you and Nick out to get the materials to fix it. The materials are on Dolce Island in a hollowed out tree stump (near the bottom of the area after you get washed up). Nick goes in and tries to get them, but accidentally disturbs six Sunkern who are in the bottom of the tree. Use Poké Assists to make this capture a lot easier. Afterwards, you bring the materials back to Booker, who fixes the ukelele.
Head over to the stone of time, where there is a glowing orb. Suddenly, it starts moving and scares all of the villagers away. Once you go to investigate, it reveals itself as a Celebi. Avoid its attacks and keep looping it to get a victory. Afterwards, it takes you back in time where you meet Ravio. Ravio is unhappy with Celebi, and tells it to take you back to your time, to which Celebi complies. Then all the villagers ask about your disappearance before you continue on.
Your Partner Pokémon
Get out of Booker's house and Pichu will want to come with you to rescue its friends. And so Pichu becomes your partner Pokémon. Before you leave Booker will explain Pichu's Poké Assist. Now go east to Lapras Beach.
When you enter Lapras Beach you witness an argument. Then you are forced to catch a Lapras. After the capture, recharge if you want and talk to Nixie to go to the Coral Sea.
Go south to enter the next area. Once here catch as many Chinchou as you can because they will help later. Keep going south and go in the little room on the east after the presence of a large metal body is confirmed. Catch the Corsola over there. Use it knock down the Crumbling Wall over there.
Then go a little bit south and a Horsea and Clamperl will attack you. After their capture, a Kingdra will knock off the "U.F.O." by using Whirlpool. Now you have to chase it and retrive it. It uses Bubble and Whirlpool. After you catch up to it Kingdra will drop it.
Go south again and you will enter a dark place. Here the more Chinchou you have the brighter the area around you is. Go west the keep going south till you get the UFO. Then two Sharpedo will attack you. After the capture you will be returned to Lapras Beach.
Back on Land
The little girl examins the UFO and declares that they are called Z.Z. Flyers. Pichu also gets really angry at it.Now that was an excellent Mission Clear.
After getting the Ranger Points the little girl indroduces herself as Nema. Now go east and up the stairs and a boy should come running down. Then go to the exit from where the boy came from.