All Working Hydro Thunder Cheats - Nintendo 64

Jump the boat
Make sure you have plenty of turbo power. Hold "Throttle", press [B], then press "Turbo". This should make the boat get some necessary air off ramps.

Bunny hop
Press [Down], hold [A], then hold [B] at the same time and use the booster. If done correctly, your boat will jump in the air.

Arctic Circle: Shortcut
Near the beginning of the level are some houses. There is a house where you can only see the roof. Jump off the roof and you should jump up about three or four places ahead.

Arctic Circle: Secret area
When you reach the area with the big oil tanker and penguins, jump over into a secret area with a red boost.

Far East: Shortcut
When you are about half way through the level you will reach a place where the water will drop three times. Just when your on the third one, immediately do your booster jump when you get on the edge. When your boat jumps in the air, hold "Boost". If done correctly, you should land on top of a place above the tunnel ahead. This will make it much faster than having to go in a big "L". Note: This requires some practice.

Far East: Boost
When you pass the first dragon shortly before the finish line, make sure you have some boost remaining for the little island holding the second dragon. If you boost/jump through the lanterns on the island, you will get extra boost. You can get an eight second boost if you hit both lanterns precisely.

Lake Powell ramp
There is concrete divider in the middle ramp.

Lost Island: 9 second booster
Enter the first waterfall that appears in the Lost Island track. Jump over the lava spout to get a 9 second booster. The waterfalls are the best place to find shortcuts and secrets. The best boat to use, once unlocked, is the Tidal Blade. It has great maneuverability.

New York Disaster: Shortcut
Near the beginning is a silver revolving door that appears to be solid. Go through it and you will find a blue boost and a red boost. To get the red boost you have to use a Hydro Jump (hold [Brake] and use "Boost").

Just after the start when you enter the first tunnel, you will see a checkered pattern on the left wall (just before exiting the tunnel). This is a shortcut that will bring you to where the revolving door would, and will take you five or so places further into the pack.

Recommended boats
The following is a list of the best boats to use on the easy and medium tracks.

Thunder Park track: Damn the Torpedoes
Lost Island track: Midway
Arctic Circle track: Damn the Torpedoes
Greek Isles track: Midway
Lake Powell track: Thresher
The Far East track: Thresher or Midway