First of all he is not Suicide mouse or That werid mickey form the Creepypasta Abandoned by Disney.

HI! MY NAME IS NIGHTMARE MICKEY OR NM
AND HERE ARE SOME SPOOKY STUFF ABOUT ME!
Age: UHHHHH DON'T KNOW IF I HAVE ONE!
Origins: I WAS A OLD MICKEY DOLL! THEN A EVIL CREATURE GRANTED ME LIFE AND NOW I AM TRAPPED AND EVERYDAY I TRY TO SET MYSELF FREE SO I CAN GO TO THE AFTERLIFE!:'(
Entertainment: WATCHING THE SUFFERING OF OTHERS!
Food: UHHHHH DEAD STUFF!
Character traits: CREEPY, DISTURBING, PSYCHOTIC, RAPIST, SINISTER, BAD, DANGEROUS, POWERFUL, EVIL, ECT!
Good side: I GIVE LIFE TO OTHER LONELY TOYS, I HELP THE POOR SOUL GO TO THE AFTERLIFE, I HELP LITTLE CHILDREN GET HOME AND I HELP ANIMALS HUNT!
Stuff he dosent like: RAINBOWS, UNICORNS, KITTIES, PUPPIES, FLOWERS, CUTE STUFF( EXPECT GIRLS), SUPER COLORFUL STUFF, ECT!!
Others:I LIKE TO HANG OUT WITH PEOPLE! MOSTLY DJSONICX. I LIKE HORROR FILMS, PLAY FNAF, READ OR WATCH CREEPYPASTAS, MOSTLY I LIKE T SCARE THE HECK OUT OF PEOPLES! OR GO TO CLUBS!
What dose DJSONICX think of NM: Uhhhhhhh. He is very disturbing, but he is actually not bad, he is sometimes kind, he can be funny at times, he can keep secrets, I can tell him anything really cuz he is good listener and also because he gets bores a lot and he doesn't care about what I say. Sooo. Uhhhhh. He's OK! (I guess)