The Legend of Zelda: Twilight Princess (GC)

In The Legend of Zelda: Twilight Princess, the next chapter in The Legend of Zelda series, Link can transform into a wolf to scour the darkened land of Hyrule. With the help of Midna, a mysterious being, you must guide Link through hordes of foul creatures and challenging bosses using new moves and a new horseback combat system. Many puzzles stand between Link and the fulfillment of his quest, so you must sharpen your wits as you hunt for weapons and items.

The GameCube version isn't mirrored like the Wii version and has free camera control. The GameCube version lacks motion controls while the Wii version does not support the GameCube controller. Although it can be patched from 4:3 to 16:9 as detailed below, there's no native widescreen support, unlike the Wii version.

Hyrule Field Speed Hack
As the player progress through the game, Hyrule Field will become progressively slower. To fix this, enable the "Hyrule Field Speed Hack" in the ISO properties (right click the game in the game list > Properties > Patches tab > Hyrule Field Speed Hack).

Unfortunately, the hack will reduce the quality of the minimap, so it is not enabled by default.

Sun Rays
Twilight Princess uses a ray effect at various points throughout the game, most notably at windows and the fountains. The effect is very easily broken. How it is broken depends on the backend used:
 * D3D - Broken by Anti-aliasing, Anisotropic Filtering and an Internal Resolution above 1x Native.
 * OpenGL - Broken by Anisotropic Filtering and an Internal Resolution above 1x Native.

Minimap
On Direct3D api, minimap will have some noise artifacts if Anti-Aliasing, Anisotropic Filtering, or Texture Filtering are enabled. Disable all 3 in order to get a "clean" map. For OpenGL, disable Anti-Aliasing.

16:9 Aspect Ratio Fix
The built-in Widescreen Hack causes clipping and reflection issues. The following Gecko codes work as a replacement, causing fewer issues. To avoid conflicts, make sure that Widescreen Hack is disabled while using these codes.

NA
$16:9 Widescreen 04453FD4 3FE79E7B 0445391C 3FE79E7B C22E97F0 00000007 3CA08027 60A52A20 80010114 7C050000 4182001C C222C418 C0030000 EC110032 D0030000 C2229F00 D223000C 38800001 60000000 00000000 C21B76F0 00000002 3C603FAD 90610008 C0010008 00000000 C219D8FC 00000002 3C603FAB 9062A248 C002A248 00000000 C219DD3C 00000002 3C003F80 9002A248 80010064 00000000 04453900 BF400000 04455E18 3F400000 041FE28C 380002C5 C21FE278 00000002 38A0FF9B B0A48000 38A00000 00000000 C21FE2C0 00000002 38A0FF9B B0A48000 38A00000 00000000 C2182198 00000004 3C603FAB 90628000 C01D0100 C2228000 EC110032 D01D0100 387D0100 00000000 C21821A8 00000004 3C603F40 90628000 C01D0100 C2228000 EC110032 D01D0100 7FC3F378 00000000 04453A14 C5000000 04453A30 45800000 C220DFD8 00000003 3C6042CA 90610004 C3810004 C3BF0018 EFBDE028 00000000 C2214BEC 00000003 3C0042CA 90010004 C0410004 EC3E1028 60000000 00000000 C2216B04 00000003 C0240360 3C0042CA 90010004 C0410004 EC22082A 00000000 C2216574 00000003 C0240350 3C0042CA 90010004 C0410004 EC22082A 00000000 C22155A8 00000002 3C00C2CA 900305E8 60000000 00000000 C22158E0 00000002 3C00C2CA 900305EC 60000000 00000000 C2215D60 00000003 3C0042CA 90010004 C0410004 EC3E102A 60000000 00000000 C2218304 00000003 3C0042CA 90010004 C0410004 EC3E1028 60000000 00000000 0421149C 60000000 C22114B8 00000002 3C0042CA 90010004 C0210004 00000000 C22469A4 00000002 3C00C2CA 90010004 C0210004 00000000 C22469F4 00000002 3C00C2CA 90010004 C0210004 00000000

JP
$16:9 Widescreen F6000001 80008180 3FADB6DB 481C4000 14000000 3FE79E79 E0000000 80008000 F6000001 80008180 C2C80000 42340000 3FADB6DB 47C35000 14000008 3FE79E79 E0000000 80008000 F6000001 80008180 C05F00C8 C07F00BC D200001C 00000006 3DC03F40 91C28004 C2228004 C0030000 EC110032 D0030000 C003000C EC110032 D003000C 38800001 60000000 00000000 E0000000 80008000

EU
$16:9 Widescreen F6000001 80008180 3FADB6DB 481C4000 14000000 3FE79E79 E0000000 80008000 F6000001 80008180 C2C80000 42340000 3FADB6DB 47C35000 14000008 3FE79E79 E0000000 80008000 F6000001 80008180 C05F00C8 C07F00BC D200001C 00000006 3DC03F40 91C28004 C2228004 C0030000 EC110032 D0030000 C003000C EC110032 D003000C 38800001 60000000 00000000 E0000000 80008000

Reduce Bloom Ghosting
Due to Dolphin's Scaled EFB setting, bloom can turn into "ghost" images around objects in areas with high amounts of bloom.

Bloom can be corrected with the following gecko codes. Use the x4 or x8 code, whichever is closest to your Internal Resolution setting. Keep Scaled EFB on. $Bloom x4 IR C235CA84 00000007 7D2802A6 3CE08000 60E79650 7C093800 41A0001C 3CE08000 60E7A15C 7C093800 41A1000C 7CA51670 7CC61670 39200000 60000000 00000000 C235CB40 00000007 7D0802A6 3CE08000 60E79650 7C083800 41A0001C 3CE08000 60E7A15C 7C083800 41A1000C 7C631670 7C841670 39030000 60000000 00000000 C235DE50 00000006 3F608000 637B9650 7C00D800 41A0001C 3F608000 637BA15C 7C00D800 41A1000C 7CA51670 7CC61670 3B640000 00000000 C2009920 00000002 38600010 38800010 60000000 00000000 C200A128 00000002 38600010 38800010 60000000 00000000 04451abc 41800000 $Bloom x8 IR C235CA84 00000007 7D2802A6 3CE08000 60E79650 7C093800 41A0001C 3CE08000 60E7A15C 7C093800 41A1000C 7CA51E70 7CC61E70 39200000 60000000 00000000 C235CB40 00000007 7D0802A6 3CE08000 60E79650 7C083800 41A0001C 3CE08000 60E7A15C 7C083800 41A1000C 7C631E70 7C841E70 39030000 60000000 00000000 C235DE50 00000006 3F608000 637B9650 7C00D800 41A0001C 3F608000 637BA15C 7C00D800 41A1000C 7CA51E70 7CC61E70 3B640000 00000000 C2009920 00000002 38600020 38800020 60000000 00000000 C200A128 00000002 38600020 38800020 60000000 00000000 04451abc 42000000

Alternatively, bloom can be disabled completely with the Action Replay code below. 

$No Bloom Effects [Ralf] 04009650 4E800020

Disabling Scaled EFB Copies can also reduce bloom ghosting at higher resolutions, by rendering the effect at its native resolution. It may, however, render other effects at the native resolution, and can decrease the clarity of these effects at higher resolutions.

HD Texture Pack
The Legend of Zelda: Twilight Princess HD Texture Pack