Abilities » Big Net | Trainers » Rescue Board
If my active Pokemon with 30HP remaining has a Rescue Board tool attached, making it have no Retreat Cost, does Ariados' "Big Net" Ability affect its retreat cost?
Nope, if a Pokemon's Retreat Cost is set to zero by an effect such as Rescue Board, it cannot be increased by Big Net.
Source: Twilight Masquerade FAQ; TPCi Rules Team (2024-05-23)
Abilities » Big Net | Attacks » String Bind
Does the extra retreat cost placed by Ariados' "Big Net" Ability increase the damage done by Ariados' "String Bind" attack?
Yes, it does.
Source: Twilight Masquerade FAQ; TPCi Rules Team (2024-05-23)