Paper Mario/Chapter 5: Hot Hot Times on Lavalava Island

Travel on whale
In order to get to Lavalava Island, you need to help the whale. A Fuzzy is in its stomach and you need to catch it. Use Watt to do so – first make the Fuzzy run around by using Watt's special powers. Once he's jumping around, watch where he lands. Go to the place that you can reach and once again use Watt's special powers. When the fuzzy jumps on you, it'll decide to fight you. Beat it and you'll be able to travel on the whale.

Hide and seek
The first thing you must do here is get Sushie to join your party. After everyone goes crazy, go west from the main part of the village (that's where the shop and the Toad House are), then through the bush-gate (press in the middle of them) and then east. Hit the tree a few times and you'll get her down.

Go west from the start point in the jungle (travel on Sushie in the water). Then, swim to the western island in that part and do the following: open the first bush-gate, fight the bush-like creature (blue) and press on the last bush. The kid will return to the village by himself.
 * First (Red) Yoshi kid

Go west, north and then east from the start point in the jungle. After moving the bushes, swim onto the island that's partially elevated. Using the flower, get up on the elevated area. Open both bush-gates and jump down the pipe. Use Watt to light up the room. The kid will get out and safely return.
 * Second (Green) Yoshi kid

Head west, north, east and south - this takes you back to the starting position but from another side. After going east, it seems impassable - but it isn't. Simply hit the stump, and you'll have a bridge to go over. Then just swim south to the platform and you're there. To get the kid down, just hit the tree. He'll return home.
 * Third (Purple) Yoshi kid

Go west, north and twice east. There, you'll see the kid surrounded by two Piranhas. Fight them and the kid will be able to safely return home.
 * Fourth (Yellow) Yoshi kid

Just go west, north and west. Make a bridge out of a stump there (hit it) and talk to the kid. He'll go home, completing this section!
 * Fifth (Blue) Yoshi kid