I'm curious since Death battle has a rule of a character has to kill any living person at winning a battle but could anyone has a possible chance of winning against an immortal opponent in a one vs one fight?

or couldn't do it at all from immortality's abilities of kept coming back to life?

In a fight to the death having a fighter who can't die seems a little unfair.

Unless there is a very viable way for that immortality to be subverted, in which case it is fair (as long as the fighting style of the immortal isn't completely altered).

@redsayn: Yup i was just curious after seeing characters like Doomsday,Ganondorf and Deadpool with their immortality in a fight.

NO

doomsday got killed by imperiex and deadpool got killed by two earths colliding each other. heck, it's not even true immortality in a sense considering a significant firepower was all needed to permanently kill such character.

@kyrees: Doomsday was never immortal, but he does resurrect.

so is deadpool since the recent secret wars.

@kyrees: Oh and thanks for telling me

@kyrees: Really? So, he can die now?

he was technically dead for a few months between the two earths collided event and earth was restored by franklin richards event

Sealing and sometimes magic in general hard counters immortality.

@kyrees: Thanks for the information.

It depends on the type of immortality,not every single one is the same.