Pikmin 2

Get the Treasure completion FMV by collecting every treasure piece and rescuing Looie.
Get Looie's Dark Secret FMV by completing all challenge mode arenas and getting the pink flower rank.
Unlock the cinemas and credits option by getting 10,000 pocos.

As you continue to collect treasure, you'll eventually come across one called the Gyroid Bust. This refers to the Gyroids, collectible items featured in the game Animal Crossing.

If you bring 20 of each color Pikmin with you, the song they hum will be the hit song from the Japanese commercial for Pikmin. It will work both in the main levels and in the caverns where it will replace the Luigi's Mansion theme they otherwise like to sing.

Collect the sphere map in Emergence Cave.

The blue pikmin are in the awakening wood level. You need yellow pikmin!To take down an electric wall. They are past the flowers that have berries.Then pass the tree stump,and you see a wall throw your pikmin up on the top and go to the right and through the water call your pikmin and attack the wall.

NOTE: These do not have to be fought in this order. This is just the order I fought them.

Boss #1:
Empress Bulblax.

Use any kind of Pikmin and throw them on her. Then, when she is about to shake, call your Pikmin and run to where you entered the floor. Repeat this until she explodes.

Boss #2:
Burrowing Snagret.
Separate your Pikmin and call the white Pikmin you found earlier. Take them to the Snagret and throw them at it's head. If it grabs some, it will get poisoned. It should be gone in a matter of seconds, but if it isn't, repeat this process.

Boss #3:
Emperor Bulblax.
Take white Pikmin and dismiss them in front of Bulblax. He will eat them. He should die almost instantaneously, but if he doesn't, throw either blue or purple Pikmin at his face.

Boss #4:
Beady Long Legs.
Use yellow Pikmin and throw them at the ball. Repeat. NOTE: DO NOT attack the feet. Attacking the feet is futile.

I've only gotten this far in the game, but I will be back, and I will call the title "Bosses (con'd)"

Collect 10,000 Pocos.

Take about ten Purple Pikmin and use the Ultra-Spicy Spray on them. Throw them all on the giant Bulblax. The Boss should be defeated in just a few seconds.

Take about three to five Red Pikmin and go into the corner directly next to Empress Bulblax. Start to throw all the Red Pikmin on it. When it is about to shake them off, whistle your Pikmin back and go into the corner, pressing the C-stick
Down, so they will be behind you and therefore will not be crushed. Keep repeating those steps until you defeat Empress Bulblax. This is a good strategy to use to keep most of your Pikmin alive.

If you come across a strange beetle that pops out of the ground, simply throw a purple pikmin anywhere around it and it will drop whatever it has.