Hi guys!
Thanks for the help! Just got the Avoider in 2C. It seemed to me that the surge enemies were the red ones that throw a raylight when they die. They appear when the two bosses are close to die. When I got this medal, I've been hit by all kind of enemies, except these. And all the other times these one hit me, because they keep coming after you, and they need a lot of shots to die.