Is something like this possible?

Changing the game ending slightly (or alot) depending on which party member strikes the last hit to the final boss?

I'm not too sure but what about conditioning? something like if player1 kills he will alter switch1, if player2 kills he will alter swith2... and then if switch1 is on it'll play one ending, if not it'll try switch2... and so on

Not sure I get it. Could someone please explain it a little better?

Uhh... Is this for RPG Maker XP? And I think this is possible, but either needs a smart eventer or a scripter.

Yeah, it's for XP. I forgot to mention that.

You're probably going to need a script for that; then you could use a conditional branch and call script in the battle event.

I don't know how to make scripts. I wish I did though. From what I've seen, you could make just about anything with a script. (Saw the ABS Script)

ABS Can also be done with events.

I think you can, if you use an abs or cbs, it can be done much easier. However if you use regular battles it can be done as well.

This works if your final battle is only a single enemy.

On the trigger, make the monster's HP be below 5% or something of that kind, test it around to find a good one. Set it to auto-start. Make a message showing, enemy has been weakened, choose someone to finish the strike. Then have show choices show the heros in that party. Disallow Cancel.

In each choice, use Conditional Branch, and set it to check if the hero is inflicted with the death condition. If yes, make it say this character is unable to attack. Since it is an Auto-Start event, it should auto-run each time you make a mistake. MAKE SURE TO MAKE AN ELSE CHOICE.

In the else choice, set a switch on. Name it End 1, or something. [Do this for all your heros, of course changing the name for each]. Show an animation, then use the change monster HP to 0, while making sure the HP Reduction can kill target is checked.

At the end of the battle, (in the event with the battle), have it make a condition branch. Check if the End 1 switch is on,  Else Check Switch 2, and so forth. Have it teleport to different scenes and you can make a different ending for each.

I know this is a bit much, if someone could help me out with some screens at the moment, it would be nice.

ABS Can also be done with events.

I think you can, if you use an abs or cbs, it can be done much easier. However if you use regular battles it can be done as well.

This works if your final battle is only a single enemy.

On the trigger, make the monster's HP be below 5% or something of that kind, test it around to find a good one. Set it to auto-start. Make a message showing, enemy has been weakened, choose someone to finish the strike. Then have show choices show the heros in that party. Disallow Cancel.

In each choice, use Conditional Branch, and set it to check if the hero is inflicted with the death condition. If yes, make it say this character is unable to attack. Since it is an Auto-Start event, it should auto-run each time you make a mistake. MAKE SURE TO MAKE AN ELSE CHOICE.

In the else choice, set a switch on. Name it End 1, or something. [Do this for all your heros, of course changing the name for each]. Show an animation, then use the change monster HP to 0, while making sure the HP Reduction can kill target is checked.

At the end of the battle, (in the event with the battle), have it make a condition branch. Check if the End 1 switch is on,  Else Check Switch 2, and so forth. Have it teleport to different scenes and you can make a different ending for each.

I know this is a bit much, if someone could help me out with some screens at the moment, it would be nice.

That is alot. Not sure I get it all, but I'll try it all later and see if I get it then. Thanks.