One shots
 

I scoured and couldn't find an official ruling on this so here it goes.

Cards references are in star munchkin

Player 1 kicks in door to fight monster A player 1 effective 6 monster A effective 4

Player 2 uses sonic plasma barf grenade adding 4 to the monsters "side" now p-6 m-8

Player 1 uses denebian rum adding 3 to his "side" now p-9 m-8

Player 2 wander in monster B effective 3

Player 1 leech bombs monster A

Player 2 has a radioactive in his hand. +5 to monster

If player 2 uses radioactive on monster B would its combat effective level be 8 or 12. (Does the one shot stay to help)

Re: One shots
 

The one-shot is adding to the monsters' side, not the individual monster, so it is not removed when the first monster is removed.

Re: One shots
 

Brf is correct.