The cards that require this say

ATTACK (TARGET LOCK) : Spend your target lock and discard this card to perform this attack.

Can anyone show me where in the rules that it state that the Target Lock has to be on the defender?

Ignore me...

Page 16 of the Rules Reference

"The “ Attack (target lock): ” header indicates that the attacker must have a target lock on the defender. The attacker does not need to spend this target lock unless instructed by the Upgrade card."

Thought you found a trick didn't you?

Thought you found a trick didn't you?

I know not what you are talking about!