Okay, I have NO CLUE what that other Team Rocket deck is on about. Muk??? Yeah right like Team Rocket EVER used Muk. Here's the REAL Team Rocket Blasts Off.
Very simple: Get Weezing up, use ability to poison enemy active pokémon. Use Koga to get Weezing out, put Arbok in, trap enemy pokémon. Repeat until win. If, for any reason, you are dead drawing and you have a Meowth, put it in as a card draw engine to get things moving, it's okay if it dies. This deck absolutely slaps Mewtwo/Mew/Gardevoir decks silly and is competitive with most other meta decks.