How do you get the yellow pikmin?

You need yellow pikmin to go through electric gates. They are immune to electricity in this game. To get yellow pikmin you must unlock the third area the "Perplexing Pool". You just need to find a special treasure which looks a lot like the half globe you get in the first underground cavern. The treasure is in the "Awakening Wood" and it's above ground.

1. To get yellow pikmin you need to be at perplexing pool. The first time you walk down the hill it will show a little scene that zooms up on them. Then, go down the hill, and walk to the left. Follow along the wall and bring a lot of white pikmin and some others for firepower. Reds are good to have here because there is a firey dude up ahead. So hug the wall until you see two rocks beside each other. They are like see-saws. Walk onto the shorter one and a number should appear above you much like while you are carrying treasure. Toss all your pikmin up there but one. Then toss the remaining one onto the tall rock. It will push Olimar and Louie up. Then, leave the pikmin there or go get him with one of the leaders, and walk forwards. There should be these sort of hollow stumps. Inside the first one there should be a firey bulborb and a poisoned gate. Get him outta the way and knock down the gate. Walk through and get high-jumping yeloow pikmin that can break electric gates!
2. See step one.