My uneducated guess:
- It focuses more on Gardevoir and its attack Psychic Lock than Gallade
- PLOX sounds cooler than p-lock or plok or whatever, and while I believe PLOX runs a couple Gallade, it's not the main focus and I guess the name is also used to differentiate between the two decks
disclaimer I do not claim to know what I'm talking about, this is just me guessing here.