And here is what I worked on for a long time(not long). I think these three robots should be added to the fifth chapter of the game. These are MASTERBOTS. They can be added to the chapter 5 as bosses.
Advantages: Masterbot equips hammer if you have armor or equip spear with shield; He equips sword if you shoot at him; He tries to kick you if you equip hammer.
-Masterbot Mark 1: energy capacity 1, energy recharge 2, block arrows 1, bow, hammer, jetpack