@Semi-Mojo

npcs? not really.

but making another robot fight back is easy; you just need to put a locator (or whatever its called) on both; and set their target finders in the brains to seek out locators, also make the minimum range large enough so the robot wont target the locator placed on itself, probably best to put the locator near the brain so its below the minimum radius

TLDR:
yes, just takes some wire knowledge

Say, is there a way to make NPCs target these robots? Or even themselves, have some cool robot wars you know.

fighting these things with simple prop damage is a blast, super good stuff dude.