Any help would be masive, thank you.

what is the speed cheat?

80078B9E 0001

that should work.

So you wanted to play through the game without having Sparx by your side the whole game, and without having to get hit three times first to lose Sparx.

Is that right?

That's easy, just enter the Gameshark code 80078BBC 0000.

It'll take away Sparx, so that Spyro has to collect gems all by himself, but if Spyro gets hit just one time, he'll faint.

The code is also a health modifier. 0000 is No Sparx (One Hit Kills), 0001 is Green Sparx Health, 0002 is Blue Sparx Health, and 0003 is Yellow Sparx Health.

If you use an Emulator and want to modify ANY number in the game without a long code http://www.cheatengine.org/

Indeed, and if you still prefer to use your good old PS (there's just no emulator replacement for the real deal after all) you can fire your game up in an emulator, search for an address that you know the gameshark / AR address for (let's say one that sets the number of rescued dragons in Spyro 1 to 80) and write the emulator address for that down. Assuming you're using your real disc image with the emulator any other addresses you find using cheat engine can be converted to work with your PS by simply adding the difference between the original GS / AR dragon address and the one found with CE.

Anybody here know how to create gameshark codes or anything along those lines?

I did some experimenting with the EU version ("Action Replay") several years past.
The "codes" are simply a means to set memory values of the game. There is also some rudimentary conditional flow control; this is what I remember:

OAAA AAAA - XXYY

The above is an instruction; all letters correspond to hexadecimal digits (0..15 where values 10 through 15 are represented by the letters A..F).
O defines the operation of the instruction.
Possible values are:

3 - Sets the byte at memory address AAA AAAA to YY. XX must be set to 00.
8 - Sets the word (2 bytes) at memory address AAA AAAA to XX YY. XX is the most significant byte and YY the least significant.
D - Conditional check; the next instruction is only executed if the current value (byte) at the given address (AAA AAAA) matches YY.

A represents the memory address that the preceding opcode refers to (see above).

X most significant byte; its meaning is dependent on the opcode (see O above). Must be set to 0 when using a single-byte instruction.

Y least significant byte; its meaning is dependent on the opcode (see O above). This is the value used with single-byte instructions.

This can be explained by the rather restricted conditional flow control as seen above. The keystate of the controller is stored in a 2-byte word with different bits mapping to whether a certain key is pressed or not. The D instruction can only work with exact values, thus it will not recognize a keypress if any other key is accidentally pressed at the same time. Depending on the game it might also be that the orientation of the analogue thumb sticks are converted to a corresponding dpad on/off value and added to this keystate.

However, the regular "Always Have Key" code only gives you the treasure chest key, which doesn't work on the giant doors, and only opens treasure chests.

Each key is at a different address and only works for a specific lock.

The 80075830 address just happens to only be the Treasure Chest Key, so it won't work on the giant doors, or on the pedestal that Gnasty Gnorc stands on.

i've been kinda wanting to play this game without sparx the whole way through without having to go and get hit a few times first

Spyro Can Fly:
D0077380 0014
80078CA4 0001
D0077380 0018
80078CA4 0000

if this is the flight code i'm thinking of, it should be noted that, first of all you hit L1 + triangle to turn it on, and R1 + triangle to turn it off.

and second, that you must make sure the code is turned off before you go into any portals (sometimes turning it off doesn't work, guess i don't press the buttons right, i don't know, so always double-check), or else the game will freeze.

also random tip: this code works really well with the moon jump code, especially when you want to go to higher parts of the level, because your flight speed near the ground increases as you go up. when you come back down, you'll fly faster. with the flying code alone, you'll fly pretty slowly.

Ultimate Jump:
80078BB0 33E7

Have Magic Breath:(That you would normally get from a fairy)
80078768 02DA

Always Have Key
80075830 0001

Infinite Time on Flying Levels
80075840 053C
80075908 053C

Moon Jump
D0077380 0040
80078AD8 0000

Have Over 65,000 Jewels
80075860 FFFF

Ultimate Speed:
80078B9E 0001

Have All Gems:
80075860 FFFF

Spyro Can Fly:
D0077380 0014
80078CA4 0001
D0077380 0018
80078CA4 0000

UNLIMITED LIVES:
8007C100 0005

INFINITE HEALTH:
8007F54C 0002

80 DRAGONS RESCUED:
8007C01C 0050

ALL 12 DRAGON EGGS:
8007C0E4 0012

6000 TOTAL TREASURE:
8007C130 1770

[glow=violet:2fb8d5e13a][/glow:2fb8d5e13a]Cheat Codes[/glow]

Crash Bandicoot: Warped demo Hold down L1 and TRIANGLE on the start screen.

You will need to reset the PlayStation in order to get back to Spyro.
99 Lives

Go into the Inventory screen and press the following keys:
SQUARE x6, O, UP, O, LEFT, O, RIGHT, O

World Select
Press the following buttons in the Inventory screen to get the balloonist to let you go to any of the homeworlds:

SQUARE x2, O, SQUARE, LEFT, RIGHT, LEFT , RIGHT, O, UP, RIGHT, DOWN
View Credits

Again, go into your inventory and press the following combination to be taken directly to the credits.
LEFT, RIGHT, UP, DOWN, O x2, SQUARE, R1, R2, L1, L2

All taken from my site: http://spyrothedragon.wikispaces.com

Good Luck!!