Nice Cheat's Touhou modifications and cheats

Think ZUN was too drunk when balancing this game? Tired of bashing your head against the wall that is Clownpiece in this game? Unwilling to put up with the supposed cheapness of the game?

Don't sweat it - let me help you cheat your way to victory in this game. Or just to tear it a new one in retaliation for what it did to you.

1. Download UsaMimi from here (you need to click a green Download button 3 times). This program is a memory editor/viewer that uses a specific format for code injections.
2. Run UsaMimi.exe. You will see a window where you'll be prompted to select a process. Look for th15.exe (therefore make sure the game is running beforehand)

3. Click the CODE button on the toolbar. Another window will pop open.

4. Another window will pop up. This is where you'll get to insert codes from the list below:
; Infinite lives
00456397-90

; Infinite bombs
00414963-90

; Maximum initial power
0043C321-44
; No power loss on death
004582FA-45

; Autobomb? Not sure about this one
00454CC9-C6

; Invincibility
00456540-C3

; Invincibility (with hit sound and "times hit" counter)
004566A5-01

; Freeze timer (only useful on bosses)
0041FDF5-EB
00428B5D-A7
; Unfreeze timer
0041FDF5-7C
00428B5D-3F

; Always autocollect
0043F949-2EE9

Copy the lines corresponding to an effect above, then click this

button to apply. Afterwards make sure to keep UsaMimi open while the game is running.

Boom, you're done! Whether you want to practice effectively or just nuke LoLK from orbit, you're good to go.
Source: Mr. Nice Cheat

Updated with codes and patches for other games:

Impossible Spell Card
UsaMimi codes:


Double Dealing Character
UsaMimi codes:


Download mod patches

Extract the zip to your DDC folder and run th14改造パッチ1.exe or th14改造パッチ2.exe to mod your copy of the game. To undo the mod just run the .bat file.
Patch #1 offers infinite lives, no loss of power and autobombing, patch #2 offers infinite bombs instead of autobomb.

Download Ultra patches

Use it the same way as above. Author says it approximately doubles bullet counts, but try them out. Additionally, it comes with autobombing by default.

Ten Desires
UsaMimi codes:


Mod patch (author asks you to "Please use for practice.", same effects as in DDC)
Ultra patch

Comes with two patches, but I dunno what the other one does.

Fairy Wars
UsaMimi codes:


Mod patch (infinite lives and autobombing)
Ultra patch

Double Spoiler
UsaMimi codes:


Mod patch (get hit and you reappear from the bottom as if dying and respawning on the other games, so you don't fail a scene if you're hit)
Ultra patch

Shoot the Bullet
UsaMimi codes:


Mod patch (same behavior as in DS)
Ultra patch

Phantasmagoria of Flower View
UsaMimi codes:


Mod patch (health does not decrease)
Ultra patch

Undefined Fantastic Object
UsaMimi codes:


Mod patch (infinite lives, no loss of power, autobomb)
Ultra patch

Subterranean Animism
UsaMimi codes (Google Translated)
Mod patch (infinite lives, power and autobomb)
Ultra patch

Embodiment of Scarlet Devil
UsaMimi codes (Google Translated)
Mod patch (infinite lives, max power, autocollect, autobomb)
Ultra patch

Perfect Cherry Blossom
UsaMimi codes (Google Translated)
Mod patch (infinite lives, no loss of power, autobomb)
Ultra patch

Imperishable Night
UsaMimi codes (Google Translated)
Mod patch (infinite lives, no loss of power, autobomb)
Ultra patch

Mountain of Faith
UsaMimi codes (Google Translated)
Mod patch (Infinite lives, power and autobomb)
Ultra patch

I'll admit I got a little lazy for SA onwards... so much to copy/paste/retranslate... x.x