A special thanks to Zelda X for supplying these codes. I have not tested any of them, so use them at your own risk.

These Codes are for the Fushigi No Boushi, which was the Japanese version of the Minish Cap. They may or may not work on the European version. In order to use them you need a Code Breaker Cheating Device.

Codebreaker Codes
0000F41B 000A
1001D6FE 0007
European Enabler Code
00006E8A 000A
1001D6A6 0007
Enable Code
32002E9D 0063Small Key Dungeon 1
32002E9E 0063Small Key Dungeon 2
32002E9F 0063Small Key Dungeon 3
32002EA0 0063Small Key Dungeon 4
32002EA1 0063Small Key Dungeon 5
32002EA2 0063Small Key Dungeon 6
32002AEA 00A0Infinite HP
32002AEB 00A0Max HP
82002B00 03E7Infinite Rupees
82002AEC 6363Infinite Bombs & Rupees
73003FA0 0E00
83003FA0 7800
Bow Level 2 always shoots Light Arrows
82002B02 03E7Infinite/Max Shells
3300119D 0040Invincible
73004024 0006
83004024 0325
Infinite Multi-Link Time
73000FF0 0200
3300116C 0004
Press L to Jump Over Things!
73000FF0 0010
E300118E 0003
73000FF0 0020
E300118E FFFC
73000FF0 0080
E3001192 0003
73000FF0 0040
E3001192 FFFC
Walk Faster
3300117A 006?Link Color Modifier (The ? ranges from 0-F for different colors. 6 is the original)
32002C9E 00FFHave Minish Cap
32002B43 0055Have Flippers, Rings, and Bracelet
82002B32 5555
82002B34 5555
82002B36 5554
Have All Equipment (Must have the Minish Cap before using this)
82002B38 5555
82002AF6 XXYY
82002AF8 XXYY
Bottles (Replace the XX and YY with four of the following numbers to get those specific items in the bottle.)

21=A Bit of Yellow Stuff
23=Milk Half Drank
24=Red Liquid
25=Blue Liquid
27=Green Liquid
29=Red Drink That Makes You Sparkly.
2A=Another Sparkly Drink..
2B=Yellow Drink That Makes You Sparkly
2C=Green Drink That Makes You Sparkly
2D=Blue Drink That Makes You Sparkly
2E=White Drink That Makes You Sparkly
2F=Blue Liquid That Dyes Your Tunic Blue Momentarily
30=Green Liquid That Dyes Your Tunic Purple Momentarily
31=Red Liquid That Dyes Your Tunic Red Momentarily
82002B44 5555Have All Scrolls
73000FF0 0201
8300116C 0009
73000FF0 0202
8300116C 0209
7300116C 0309
8300116C 0409
Press L+A To Shrink, L+B To Normal Size
32002AF5 00XXThing equipped on B Modifier (Replace the XX with any of the following)
32002AF4 00XXThing equipped on A Modifier (Replace the XX with any of the following)

00= nothing
01= very first sword
02= Green Sword
03= Red Sword
04= Blue Sword
05= some kind of lamp? If you use it, you’ll swing your sword.
06= Big Sword
07= Normal bombs
08= Remote bombs
09= Bow
0A= Bow V2
0B= Boomerang
0C= Boomerang V2
0D= Shield
0E= Shield V2
0F= Lamp(the real one)
10= Lamp V2
11= Wind Jar (“Vacuummer”)
12= Magic Staff
13= Claw
14= Wings(more of a high-jump)
15= Run Boots
16= …something, creates glitch-squares
17= Ocarina, summon bird
18= Book, no use
19= Mushroom, same here
1A= These thingys for swimming, whatever they’re called, if you use them, you’ll create glitch-squares
1B= Fake Lamp, if used, you’ll “grab”.
1C+= useless, non-useable items