Teenage Mutant Ninja Turtles: WTMNT - Attack of the Grem

Love playing TMNT but tired of the same old game? This hack aims to put a new spin on an old classic to keep things fresh. Using the Return to New York hack as a base, a brand new story with new characters, enemies, and a new ending have been added. The story is loosely based on the Archie comic Teenage Mutant Ninja Turtles Adventures Special: Winter 1994.

The Return to New York hack can be found here:

Development thread:

Teenage Mutant Ninja Turtles: Attack of the Grem - - - - - - - - - - - - - - - - - - - -

Project start date: 7/1/2021

File SHA-1: 89ADF2D9E453FC7FC491F968495C80C0C4A568D5
File CRC32: 83213CA0
ROM SHA-1: B239C2D48E84CA676DEE4461D4D6A1F77F34255D
ROM CRC32: EE921D8E

Stats/info: - - - - - - - - - - - - - - - - - - - -
Attack 1/2 Health Speed Jump Defense Special
April 12 12 1.0x 1.0x 1.0x 1.0x
Jennika 16 24 1.0x 0.88x 1.5x 0.5x
Venus 10 12 1.22x 1.0x 0.8x 1.2x
Lita 09 10 0.88x 0.63x 0.8x 1.2x

Enemy List: - - - - - - - - - - - - - - - - - - - -
Set 1: Purple Foot Soldier, Mouser, Tubular Transport
Set 2: Orange Foot Soldier (Chainsaw), Foot Mystic (Water), Drone Robots
Set 3: Fire Grem, Green Foot Soldier (Whip), Helicopter Missile, Utrom
Set 4: Grem, Rat King, Blade, Balloon Missile
Set 5: Yellow Foot Soldier (Boomerang), Flyborg, A6 Annihilator
Set 6: Gray Foot Soldier (Wall Crawler), Flying Mouser
Set 7: Roadkill Rodney, Foot Mystic (Earth), Excavator, Mine
Set 8: Blue Foot Soldier (Jetpak/Laser), Foot Elite, Technodrome Sentry
Bosses: Bebop, Rocksteady, Slash, Metalhead, Baxter Stockman/Giant Mouser, Technodrome, Shredder

Known Bugs: - - - - - - - - - - - - - - - - - - - -
-SRAM doesn't work for stage 6. Seems to be an issue with the cowabunga SRAM base
-If you deal the final blow to shredder in the air AFTER he jumps AND one of his mutagen shots
is still on screen, his death animation will not start, your turtle will freeze, and you'll be
softlocked. This glitch appears to be present in the original as well, but it's frustrating
enough that it bears repeating here.


Change Log: - - - - - - - - - - - - - - - - - - - -

Version 1.0 (7/18/21)

New ending sequence
Konami Logo
Replaced all four turtles
New Story
Replaced April with Casey Jones
Replaced Fire Freak and Robo with Grem

Special thanks: : - - - - - - - - - - - - - - - - - - - -
Rainponcho: ASM hacking
RetroRain: MMC5/SRAM base "Cowabunga"
MersoX: Mouser Sprite
spiiin: CadEditor
Dan: Cowabunga Editor

Development thread: (Post questions or comments here)
https://www.romhacking.net/forum/index.php?topic=24352.0

Database match: Teenage Mutant Ninja Turtles (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 89ADF2D9E453FC7FC491F968495C80C0C4A568D5
File CRC32: 83213CA0
ROM SHA-1: B239C2D48E84CA676DEE4461D4D6A1F77F34255D
ROM CRC32: EE921D8E