Just copy and paste this into your game file setting for which version of zelda you have and in my case it's pal so the file name is GZ2P01 in my case. copy and paste this and save it as GZ2P01.

(# GZ2P01 - The Legend of Zelda Twilight Princess

[Core]
# Values set here will override the main

dolphin settings.

[EmuState]
# The Emulation State. 1 is worst, 5 is best, 0 is not set.
EmulationStateId = 4
EmulationIssues = Enable the patch "Hyrule Field Speed Hack" in iso

properties for a speed boost.

[OnLoad]
# Add memory patches to be loaded once on boot here.

[OnFrame]
# Add memory patches to be applied every frame here.
$Hyrule Field Speed Hack
0x8003d63c:dword:0x60000000
0x8003d658:dword:0x60000000
0x8003d670:dword:0x60000000
0x8003d68c:dword:0x60000000

0x8003d690:dword:0x60000000
0x8003d694:dword:0x60000000
0x8003d698:dword:0x60000000
0x8003d69c:dword:0x60000000
0x8003d6a0:dword:0x60000000
0x8003d6a4:dword:0x60000000
0x8003d6a8:dword:0x60000000
0x8003d6ac:dword:0x60000000
0x8003d6b0:dword:0x60000000
0x8003d6b4:dword:0x60000000
0x8003d6b8:dword:0x60000000
0x8003d6bc:dword:0x60000000
0x8003d6c0:dword:0x60000000
0x8003d6c4:dword:0x60000000
0x8003d6c8:dword:0x60000000
0x8003d6cc:dword:0x60000000
0x8003d6d0:dword:0x60000000
0x8003d6d4:dword:0x60000000
0x8003d6d8:dword:0x60000000
0x8003d6dc:dword:0x60000000
0x8003d6e0:dword:0x60000000
0x8003d6e4:dword:0x60000000

0x8003d6e8:dword:0x60000000
0x8003d704:dword:0x60000000
0x8003d71c:dword:0x60000000
0x8003d738:dword:0x60000000

[Video_Settings]
SafeTextureCacheColorSamples = 512

[Video_Hacks]
EFBToTextureEnable = False
EFBCopyEnable = True
EFBCopyCacheEnable = false

[Speedhacks]
0x803420bc=200)