Enemies Damaging Other Enemies

[Cheezepin]

Is there a way to configure an NPC to have it be damaged by other enemies' projectiles, like fireballs? I am able to let them be damaged by Mario's projectiles, but not other enemies.

[HugoMDM]

you only can use this npcs for do that

[Mushroom King]

The problem would be it doesn't hurt the player, and worst, it can kill the npc launching the attack.

[Ariinui]

mushroom king, does the npcs would ne the same npc (2 hammer bros by example)
because if no, you could overlap the npc's fireballs with an player'S fireball and make the npc imuned to fire
i know it could be glitchi but it may works