This deserves a project, so far divided in 2 categories

1. Sumo robots with Wheels

https://youtu.be/nb-5wq9CI20

How to make in this link:

SimpleSumo- Educational Fighting Robots!  Instructables

2. Biped/Humanoid battle

zowi/mods at master · bqlabs/zowi (github.com)

Zowimanoides instructions

Subcategories by type of servo and number of motors

3. Weapons

Work in progress attached the first hammer to use with Humanoid arm. Welcome ideas

  • Hammer
  • Axe
  • Mace
  • Sword
  • Shield
  • Punch
  • Fishing rod
  • Lightsaber
  • Grip
  • Drummer
  • Xylophone
  • Microphone singer
  • Laser pointer
  • Lego compatible
  • Lift weights