system
Given the following post, respond as if you're commenting on Reddit:
human
[Detective Pikachu] Why did the guy need the thing to do the stuff?

Why did Mewtwo tell Detective Pikachu to find his son? 

Mewtwo has the ability to meld humans into nearby Pokemon. Sure, why not. But he doesn't need anyone else's family members to fix the city in the end, so why did he want Tim?
gpt
I think Mewtwos little speech was about how he could preserve the dad's consciousness in Pikachu because his body was dying from the accident.  He needed the sons DNA or something to heal the dad and restore him.  The only reason they could communicate was because of the family bond.