Crash Bandicoot: the Huge Adventure Cheats

GBA | Submitted by Westley aka Uncle Happy

Tornado Spin and Double Jump

To get the double jump, beat the second boss. The second boss is Dr. N. Gin. He has a ship. On the side it has missle launchers. On the top, a helicopter bomb launcher, and on the bottok, a cannonball launcher. Shoot those (You're in the air) and destroy him, and you get the double jump techique! To activate it, just jump and press a in the air.Beat the thirs boss (Tiny the tiger) to get the tornado spin. Just avoid Tiny and hit him when he attacks with his spear. To activate the tornado spin, quickly press b three times.
GBA | Submitted by BaDaSs

Secret Level

After you complete all the levels getting all gems and GOLD relics, you get a different ending after Neo Cortex and something special happens to him!

GBA | Submitted by Oliver Stannard

To get 101%

Once got 100% percent on your save file go and beat cortex again and you will get a new level where mutated bosses chase you around. Complete and get 101% on your save file.
GBA | Submitted by Westley aka Uncle Happy

Super belly slam

To do a super belly slam, beat the first boss. To do it, do what you'd normally do on a regular body slam. (a then r)
GBA | Submitted by unknown

Turbo running

First, you must complete all levels and defeat Neo Cortex. Then, go to a level and press L to run faster. This helps your earn relics easier.
GBA | Submitted by BaDaSs

Gem Locations

Here's where to find the Colored Gems:
The Red Gem:
The Level with the Red Gem in, Do not hit the normal switch(!) before the Nitro Switch. Jump on the Nitro Switch then follow the path below to get the Red Gem!
The Yellow Gem:
On the last Level, The Check Point followed by the thingy that makes you spin over Nitro Boxes. Spin to the left on to the Green An Red Thing!
The Blue Gem:
On a level called Ruined, after the nitro box Double Jump and float spin Left!
The Green Gem:
After you see the first normal(!) box hit it then go back past the start!