Ecco The Dolphin: Defender Of The Future

Unlock Unlimited air:

At the title screen, press and hold L1 + L2 + R1 + R2 and push Square, Square, Triangle, X, Circle.

Unlock Unlimited health:

At the title screen, press and hold L1 + L2 + R1 + R2 and push Triangle, X, X, Up, Up, Down.

Unlock Level select:

At the title screen, press and hold L1 + L2 + R1 + R2 and push Up, Up, Down, Down, Triangle, X,X.

Unlock All Vitalits:

At the title screen, press and hold L1 + L2 + R1 + R2 and push X, X, Circle, Cirlce, X, Circle, Up, Down, Down.

Unlock Swim with a group:

At the title screen, press and hold L1 + L2 + R1 + R2 and push X, Up, X, Down, X, Triangle.

Dolphin Soccer:

When you go to the Powers Of Levitation level, find your way to the room where the clan General (the dolphin that has the inspection) is located. Swim through the side of the wall that moves like Jello. On the floor near one of the orange lights is a soccer ball. Get it, then go to the selection screen for levels. An option for the Dolphin Soccer mini-game will be at the bottom of that list.

Bonus levels:

Finish the game under the hard difficulty setting. The Up & Down level will glow, and you can now play both 2D bonus levels.

Hanging Waters Vitalit locations:

1: Find the Vitalit in the first ball of water to your right, just as you start. It is in the bottom seaweed.
2: After you plunge into the rock pool, the next Vitalit can be found in the tube as you exit the other side.
3: Near the floor of the first pool (after Ice and Fire).
4: The pool below Abyss if Inferno.
5: In the pool immediately before the Mutaclone Boss.