 The Bacteria Backroom's creature versus Siren Head from Trevor Henderson. Who would win in a fight? Well, Bacteria is an entity from Kane Pixel's Backroom's lore that resides deep inside of level zero. It's a tall, skinny, and wiry type creature that can run pretty quick, and it's very aggressive. Its height ranges from 9 to 10 feet tall, and it attacks by brute force. Siren Head is an entity out of the Trevor Henderson catalog of creatures, and it's a very, very aggressive, long and skinny creature, with a famous Siren shoved onto its shoulders. It lives in sparsely populated areas, and attacks again by stalking and brute force. The issue for old Bacteria is that Siren Head is over 40 feet tall, so unless Bacteria is stronger than Hulk or Simpsolic, then Siren Head could just step on it and flatten into a pancake. Sorry, Bacteria. What other creatures I should fight together?