Before I forget to share : Here are some codes I (and mostly others) worked out
Wind Waker HD (should work on all regions, but I tested on USA):
Have Bottle 3 + fill it with fairy [CosmoCortney]
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF25C
00100000 00000057
D0000000 DEADCAFE
Have bottle 4 + fill it with fairy [CosmoCortney]
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF25D
00100000 00000057
D0000000 DEADCAFE
Have 1st Bottle + fill it with magic/forest water + set timer to maximum [CosmoCortney & Dekirai]
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF25A
00100000 00000059
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF274
00120000 0000FFFF
D0000000 DEADCAFE
Interestingly, the timer will not begin to countdown until you enter doorway. Use the code below to set the timer to 0000 if you want your bottle back in the meantime.
Forest Water Timer [Dekirai]
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF274
00120000 0000XXXX
D0000000 DEADCAFE
XXXX above is a hex value from 0000 (forest water turns back to regular water) to FFFF (maximum)
Bait Bag Slot 1 and 2 are always full with All-Purpose Bait and Hyoi Pear [CosmoCortney & Randymmmmm & jack44556677]
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF28E
00100000 00000082
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF2B4
00100000 000000FF
30000000 1096346C
145B18B2 159D6EAD
31000000 000AF28F
00100000 00000083
D0000000 DEADCAFE
Sadly you need to reequip the pear each time you use it.
Spoils Bag Contents
[0x1096346C] + 0xAF286 ?? Slot 1
[0x1096346C] + 0xAF287 ?? Slot 2
[0x1096346C] + 0xAF288 ?? Slot 3
[0x1096346C] + 0xAF289 ?? Slot 4
[0x1096346C] + 0xAF28A ?? Slot 5
[0x1096346C] + 0xAF28B ?? Slot 6
[0x1096346C] + 0xAF28C ?? Slot 7
[0x1096346C] + 0xAF28D ?? Slot 8
Bait Bag Contents
[0x1096346C] + 0xAF28E ?? Slot 1
[0x1096346C] + 0xAF28F ?? Slot 2
[0x1096346C] + 0xAF290 ?? Slot 3
[0x1096346C] + 0xAF291 ?? Slot 4
[0x1096346C] + 0xAF292 ?? Slot 5
[0x1096346C] + 0xAF293 ?? Slot 6
[0x1096346C] + 0xAF294 ?? Slot 7
[0x1096346C] + 0xAF295 ?? Slot 8
Delivery Bag Contents
[0x1096346C] + 0xAF296 ?? Slot 1
[0x1096346C] + 0xAF297 ?? Slot 2
[0x1096346C] + 0xAF298 ?? Slot 3
[0x1096346C] + 0xAF299 ?? Slot 4
[0x1096346C] + 0xAF29A ?? Slot 5
[0x1096346C] + 0xAF29B ?? Slot 6
[0x1096346C] + 0xAF29C ?? Slot 7
[0x1096346C] + 0xAF29D ?? Slot 8
All Contents Values (List mostly from Dekirai)
0x1F = Joy Pendant
0x20 = Telescope
0x22 = Wind Waker
0x25 = Grappling Hook
0x26 = Picto Box
0x29 = Iron Boots
0x2A = Magic Armor
0x2D = Boomerang
0x2F = Hookshot
0x31 = Bombs
0x33 = Skull Hammer
0x34 = Deku Leaf
0x35 = Bow & Arrow with Fire & Ice
0x36 = Bow & Arrow with Fire, Ice & Light
0x45 = Skull Necklace
0x46 = Boko Baba Seed
0x47 = Golden Feather
0x48 = Knight's Crest
0x49 = Red Chu Jelly
0x4A = Green Chu Jelly
0x4B = Blue Chu Jelly
0x50 = Empty Jar
0x51 = Red Elixier
0x52 = Green Elixier
0x53 = Blue Elixier
0x54 = Soup (Half)
0x55 = Soup
0x56 = Water
0x57 = Fairy
0x58 = Forest Firefly
0x59 = Forest/Magic Water (expiration timer is automatically 00:00, set it with 0x15073624)
0x77 = Swift Sail | Turbo Sail (doesn't display in items ... may not be correct - or possibly different for USA?!)
0x82 = All-Purpose Bait
0x83 = Hyoi Pear
0x8C = Town Flower
0x8D = Sea Flower
0x8E = Exotic Flower
0x8F = Hero's Flag
0x90 = Big Catch Flag
0x91 = Big Sale Flag
0x92 = Pinwheel
0x93 = Sickle Moon Flag
0x94 = Skull Tower Idol
0x95 = Fountain Idol
0x96 = Postman Statue
0x97 = Shop Guru Statue
0x98 = Father's Letter (For Komali, the rito prince)
0x99 = Note to Mom
0x9A = Maggie's Letter
0x9B = Moblin's Letter
0x9C = Cabana Deed
0x9D = Complimentary ID
0x9E = Fill-up Coupon
Spoils Bag Content Counts (Counts are per item type, not by slot)
[0x1096346C] + 0xAF2AC ## Skull Necklace
[0x1096346C] + 0xAF2AD ## Boka baba seed
[0x1096346C] + 0xAF2AE ## Golden Feather
[0x1096346C] + 0xAF2AF ## Knight's Crest
[0x1096346C] + 0xAF2B0 ## Red chu jelly
[0x1096346C] + 0xAF2B1 ## Green chu jelly
[0x1096346C] + 0xAF2B2 ## Blue chu jelly
[0x1096346C] + 0xAF2B3 ## Joy Pendant
*note : ## is between 00 (item shows but is not usable) and FF (255).
Bait Bag Contents Counts
[0x1096346C] + 0xAF2B4 ## Slot 1
[0x1096346C] + 0xAF2B5 ## Slot 2
[0x1096346C] + 0xAF2B6 ## Slot 3
[0x1096346C] + 0xAF2B7 ## Slot 4
[0x1096346C] + 0xAF2B8 ## Slot 5
[0x1096346C] + 0xAF2B9 ## Slot 6
[0x1096346C] + 0xAF2BA ## Slot 7
[0x1096346C] + 0xAF2BB ## Slot 8
*note : only applies to things that have counts - possibly only all purpose bait. hyoi pears for instance will ignore this value and will always disappear from inventory once used. They can be restored using the contents codes above) Max FF is fine, counter will only show the first 2 digits of a 3 digit number - but everything works.
Twilight Princess HD (These are USA offsets, but they might work in EUR as well)
*NOTE* - jgecko and standard tcpgecko won't work. Use this one found here https://gbatemp.net/threads/trainer-the-legend-of-zelda-twilight-princess-hd.435285/ and use the tcp-gecko-net found here . Sadly if you have wind waker installed it will automatically open it - just close it, and open twilight princess and you are good to go.
10647B63 XX wallet modifier 00 wallet 01 big 02 giant 03 collosal
10647C2C = 00FFFFFF - have all golden bugs
10647C40 XX - first byte is max number of arrows which seems to also control quiver type. 00 = no quiver, 1E = 30 quiver, 3C = 60 is big quiver, 64=100 giant quiver - however any value which is not the previous lesser values will be the giant quiver with whatever maximum you set.
10647C41 XX - maximum number of regular bombs you can carry in any bag
10647C42 XX - maximum number of water bombs you can carry in any bag
10647C46 XX - maximum number of bombling [bombchu] bombs you can carry in any bag
Setting the above can and will erase the bomb bag type below (sets to default of 50). Set the above first, then the bomb type, then the bomb count.
10647BF3 XX - bomb type of first bag 50 = empty bag 70 = normal bomb 71 = water bomb 72 = bombling bomb FF = no bag at all
10647BF4 XX - bomb type of second bag 50 = empty bag 70 = normal bomb 71 = water bomb 72 = bombling bomb FF = no bag at all
10647BF5 XX - bomb type of third bag 50 = empty bag 70 = normal bomb 71 = water bomb 72 = bombling bomb FF = no bag at all
10647C34 XX - Number of arrows in quiver
10647C35 XX - Number of bombs in bomb bag #1
10647C36 XX - Number of bombs in bomb bag #2
10647C37 XX - Number of bombs in bomb bag #3