If I have a Klawf ex with "Counterattacking Pincer" Ability and Rugged Helmet attached to it, what happens if it gets damaged by an opponent's attack from a Fusion Strike Pokemon that has a Fusion Strike Energy and a Double Turbo Energy attached to it?
The Counterattacking Pincer ability and Rugged Helmet are triggered simultaneously, so you may choose the order in which they are applied. If you choose the Counterattacking Pincer ability first it will fizzle due to Fusion Strike Energy. However, if you choose to use Rugged Helmet first you can put the Fusion Strike Energy into the opponent's hand and then you can use Counterattacking Pincer to discard the Double Turbo Energy.
Source: TPCi Rules Team (2023-08-31)