Here's one that got me to write a fanfic that's still on. But don't hate me for it. NOTE: some adult content is abroad.

' An almost dead Mewtwo returns to New Island after 15 years on a journey to find himself....In an honourable sense, he doused himself in gasoline & ends his life. [so that there will never be anything but his ashes] But in a bizzare sort of fate, when the fire burns away at his corpse [here's the spooky thing] it extinguishes by itself, only to reveal that something is moving within his body.

...
...
...
...
It's Ai.
So in all: Mewtwo dies & Ai lives again.'

How & what did this happen?
It's all bit complicated to explain here, but it makes sense. Believe me, my fic gets to that.