It looks like a stretched version of Bob XIII's channel image, which is meant to be a tank (the Mothership) in Diep.io, making this Hat the first ever crossover between MooMoo and another io game.
- XIII possibly references that the YouTuber is 13 years old, as XIII is 13 in Roman Numerals.
The Bob XIII Hat has no effect.
- Have everyone on your team wear the Bob XIII Hat so you can all look the same.
- Wear this Hat to show you are a fan of Bob XIII.
- Don't forget to Like and Subscribe!
- The Bob XIII hat was added in version 0.88