Teenage Mutant Ninja Turtles III: The Manhattan Project: TMNT3 - Turtle Swap

This hack allows both players to switch the turtle they're playing as by pressing "select":

- switches turtle ID, palette, name and face on the hud; and plays a sound
- both players can select the same turtle, even on the character select screen or after dying

Also includes a bugfix as a bonus: fixed the weapons of the 2nd player being offset when facing the right direction (see last screenshot).

Teenage Mutant Ninja Turtles III: The Manhattan Project


Turtle Swap


v1.1, 10th of Feburary 2021


1) General Info
2) Changelog
3) Patching & compatibility with other hacks
4) Credits & Thanks




1) General Info

This is a romhack of Teenage Mutant Ninja Turtles III: The Manhattan Project.
It is made for the NES NTSC-U version of the game.

It allows both players to switch which turtle they're playing as by pressing "select":
it will change the turtle ID, the palette, the name and face on the HUD, and play a sound.

Both players can select the same turtle, even on the characters select screen or when selecting
a turtle after dying.

This hack also includes a bugfix: fixes the weapons of the 2nd player being offset when facing
the right direction.

In the near future I will share a small FAQ that details the stats of each turtle (attack speed,
range, damage values of specials, etc), so watch out for that, it'll probably be on GAMEFAQS.com.


2) changelog

v1.0: release
v1.1: moved some code around so this hack becomes compatible with another hack of this game
called "Minor Fixes".


3) Patching & compatibility with other hacks


Made for and tested with this rom:
Teenage Mutant Ninja Turtles III - The Manhattan Project (USA).nes

This hack is now fully compatible with "Minor Fixes" by SCD and rainponcho:
http://www.romhacking.net/hacks/3468/
Order of patching should not matter.

Compatibility with other hacks is unlikely. The issue is that everyone uses the same free space
to add additional codes, and said space is limited.

Using an IPS patcher such as Lunar IPS to patch the rom.
You can find the rom on archive.org.

If you had a previous version of this hack already patched, you'll need to re-patch an og rom with
this version: do not patch v1.1 onto v1.0.



4) Credits & Thanks

ASM editing: MetHy aka Ness

Thanks to the FCEU X and YYCHR devs.

Thanks to Anonymous (?) and Ilya Indigo for their "weapons select" hacks.
This hack is similar, but I wanted to go one step beyond by adding all the extra bells & whistles
that should go with switching characters.

Feel free to use this hack in your own hacks, no need to ask me, just a small credit is enough.




Database match: Teenage Mutant Ninja Turtles III - The Manhattan Project (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 30B6AFB694AB5045B88F723A1ADE44575C33FB69
File CRC32: DBB3BC30
ROM SHA-1: B3228341C41EDD6751AF37FD3DC83B07899A6D55
ROM CRC32: BB6D7949