Are NES TMNT III runs on Cowabunga Collection accepted?

As far as I know. The answer is "yes"
Just make sure to show the enhancement option screen. And all special options or settings are set to "off" then just have fun.
If you're gonna try playing the Japan version you can show the difficulty In the options for easy/normal and turn your live up to 7. Perfectly ok!
Good luck on your games 
looking forward to any speedruns.
Lightning~

Cowabunga Collection

savagedawg243

Teenage Mutant Ninja Turtles III: The Manhattan Project

Nintendo Entertainment System

GJJJGJJJ

thenesmaster

JacksonTV

Chocopie132

TechGamer36

USA / NTSC

Raph

Mike

1 Player

2 Player

1P region

2P region

Single Turtle

Easy

Teenage Mutant Ninja Turtles

Leaderboard update

Region on my run

Moderator, modify the real player, please

New WR?

Seperate categories?

whitman_price_

omqwat

eyuzheng

LRock617

ArkanoidAddict

Zewwy