Harper’s Reset Level Code
If you notice anything not respawning. Please report it in the comments. Head down to the very bottom of the page to read notes about the code. Especially the new reset camera code.
Most of this code was done by me(Harper) but the Reset Coin Count was done by hellool.
http://www.twitch.tv/harper420
http://www.twitch.tv/hellool
Harper’s Level Reset Code
(N64 - USA) (L button to reset)----------------------------------------------------------------USA
D033AFA1 0020            <- Condition to activate reset level code
8033B248 0002           <- Reset level code  (put 0003 to not destroy elevators, ttc will freeze)
8029CEC0 0000         <- Awesome code respawns most things
8029CE9C 0000        <-Respawns the rest of the shit
Optional:---------------------------------------------------------------------------------------------
Restore Health (L Button)
D033AFA1 0020         <-Condition to restore health
8133B21E 08FF        <-Health
Reset Camera. (Dpad up before resetting the level. Do not stand next to a door, or just reset twice.)
D033AFA0 0008        <-Condition to reset camera (Dpad up)
8033C6D4 0010        <-Resets Camera, 03 is flight cam, 01 is most levels default.
(N64 - JP) (L button to reset)---------------------------------------------------------------------JP
D0339C31 0020         <- Condition to activate reset level code
80339ED8 0002         <- Reset level code  (put 0003 to not destroy elevators, ttc will freeze)
8029C740 0000         <- Awesome code respawns most things
8029C71C 0000        <-Respawns the rest of the shit
Optional:---------------------------------------------------------------------------------------------
Restore Health (L Button)
D0339C31 0020         <-Condition to restore health
80339EAE FF08         <-Health
Reset Camera. (Dpad up before resetting the level. Do not stand next to a door, or just reset twice.)
D0339C30 0008        <-Condition to reset camera (Dpad up)
8033B364 0010        <-Resets Camera, 03 is flight cam, 01 is most levels default.
Reset Coin Count by Hellool
This was done by hellool. I couldn't figure it out and while I was busy smoking weed hellool finished it up lol. The issue was you couldn't decrement marios coins. You couldnt just set the coin count to 0 once you found it. Hellool figured it out. If you'd like the explanation ask hellool.
16bit (Works on GS 3.0+)
(US)
D033AFA1 0020
8133B262 0000
D033AFA1 0020
8133B218 0000
 (JP)
D0339C31 0020
81339EF2 0000
D0339C31 0020
81339EA8 0000
 8bit (for 2.x GS)
(US)
D033AFA1 0020
8033B262 0000
D033AFA1 0020
8033B263 0000
D033AFA1 0020
8033B218 0000
D033AFA1 0020
8033B219 0000
 (JP)
D0339C31 0020
80339EF2 0000
D0339C31 0020
80339EF3 0000
D0339C31 0020
80339EA8 0000
D0339C31 0020
80339EA9 0000
Note NEED TO REWRITE
DeathCode For Old GameSharks
8-bit Death code (For gamesharks below 3.0) (Press R and L to activate)
D033AFA1 0030
8133B21E 00FF
or
D033AFA0 0004 (dpad down to activate)
8133B21E 00FF
The reason gamesharks below 3.0 cannot use the other death code is because they do not support codes starting with D1,D2 and D3. Anything on the dpad is a 16 bit value. You need a D1 code to let the dpad 16 bit value activate the code. So anything activated with the Dpad will not work on a gameshark below 3.0, Unless you change the conditional to 33AFA0 (-1) and delete the last two digits. So dpad down goes from 0400 to 0004.

This means if you find a code with D1 but have a gameshark that is below 3.0 and the code does not work. Replace the code with D0 but it will only read the last two digits in the value part of the code. 16 bit will read all four digits, 8 bit will only read the last two digits. So find a button combo that does not take 3-4 digits, find one with two digits using this button value graph.
XXYY 8 Bit(D0 CodeType) will read YY
XXYY 16 bit(D1 CodeType) will read XX and YY
So choose a button with two digits instead of three and replace D1 with D0.
BUTTON_C_RIGHT = 0x0001,
        BUTTON_C_LEFT  = 0x0002,
        BUTTON_C_DOWN  = 0x0004,
        BUTTON_C_UP    = 0x0008,
        BUTTON_R       = 0x0010,
        BUTTON_L       = 0x0020,
        BUTTON_D_RIGHT = 0x0100,
        BUTTON_D_LEFT  = 0x0200,
        BUTTON_D_DOWN  = 0x0400,
        BUTTON_D_UP    = 0x0800,
        BUTTON_START   = 0x1000,
        BUTTON_Z       = 0x2000,
        BUTTON_B       = 0x4000,
        BUTTON_A       = 0x8000 (copied from kazes gameshark doc, thank you kaze)
VC - USA

For some reason I couldn't put all of them in the same code. Probably because of my ignorance of the more advanced codetypes of geckoOS but Ill have it in one code soon for now just put it in three codes. No issue since you use an SD card to get the codes anyway.

VC
Just copy and paste the VC codes inside your cheats .txt on the SDCard and use your favorite cheat manager to create a .gct with it.
(VC)
Timer (Harper)
050B3808 A03BB25E
050B7DFC A1A000EE
010B5317 00000040
050B3810 00000000
291A5120 00006010
031A53EC 00000000
Same timer you probably have Press L+R+B to reset timer

Restart Level Does not Reset Flags (Harper)
291A5120 00006010
011A53C8 00000002
E0000000 80008000
Add with Timer press L+R+B

Reset Health (Harper)
291A5120 00006010
011A539E 00000008
Add with timer and restart level code
NOTES
To practice Vanish Cap
You also may optionally put 0003 instead of 0002 for the value for the reset level code it will not destroy elevators and you can practice Vanish cap BUT TTC will freeze. The code will destroy elevators when set to 0002.(default)

Reset Camera Code issues
You need to reset the camera in BBH away from a door because the door holds a trigger that forces the camera mode. Or you can reset, then reset the camera and reset again to be centered like normal.

Swimming is a constant trigger that forces the camera so you need to reset the level, reset the camera and then reset the level again if you want it perfect or just reset the level and then reset the camera but it wont be perfect just like you entered the level.
The camera gets reset to JRB default value of 10. BBHs camera is actually 04 but it gets forced to 04 right before you enter the front door. So youll notice the camera jerk down slightly when entering the front door of BBH. The JRB camera seems to be the best one to reset to though. Most levels reset it to 01, but BBH allows the JRB camera. So youll notice the jerk when you enter the mansion.
If youd like it to be more accurate. You may add the BBH camera in a different Dpad then the JRB one.
Example:
D033AFA0 0008        <-Condition to reset camera (Dpad up)
8033C6D4 0010        <- JRB camera
D033AFA0 0004        <-Condition to reset camera (Dpad down)
8033C6D4 0004        <-BBH Camera
D033AFA0 0002        <-Condition to reset camera (Dpad left)
8033C6D4 0003        <-Flight camera (Just for fun xd)


US offset
US - 1370 or 780 = JP
VC offset
US + Biny(?) = VC