Q
Last turn I had a darkness character in my battle zone, but it couldn't attack because its power cost wasn't met.
This turn I set Part-timer・Baker (Neko Reset)
and swapped it into the battle zone. Does Part-timer・Baker (Neko Reset)'s effect take effect?
A
Yes, it does.
Whether it could attack, or whether it was new to the battle zone last turn, doesn't matter. Being in the battle zone last turn counts as having been "used".