1. Be fictional
    The only non-negotiable criterion
  2. 18 m tall
  3. Humanoid
  4. Transform into a non-humanoid shape
  5. Hold a gun bigger than its leg
  6. Brightly colored
  7. Piloted by someone too young to drive
  8. Wear a cape
  9. Have angel or bat wings, if capeless
  10. Giant rocket booster pack, if no wings or cape
  11. Giant sword, axe, or other melee weapon (sword is best, though)
  12. Glowing eyes
  13. Detachable fists, for rocket punch purposes