My question is how much does Kingpin mastermind to someone else.

The ability that causes the question is Kingpins trait:

Please Escort This Man Out Of My Office: When Kingpin takes damage, he takes a maximum of 1 unless he is the only character on your force.

Mastermind says" when this character would be dealt damage, transfer the damage dealt to an adjacent character...

Im pretty sure he transfers all damage, but Im just wondering what order things happen. Does the damage dealt get put to one before mastermind or would that only happen when he takes the damage himself.

Page 10 of the rulebook. Damage taken and damage dealt are different, and he transfers damage dealt, so the masterminded guy takes full damage.

Dang sorry bout that. I tried to find the difference between dealt and taken.

Thats pretty much how I figured it would be.

No worries, knowing the difference tends to solve a lot of other problems.