Chien-Pao Palkia

This is a very popular build, and I've seen pretty consistent success with it.

The main strategy is to get Baxcalibur on your bench as quickly as possible because its Super Cold ability allows you to accelerate energy to all your other Pokemon. Chien-Pao is the main attacker, since it can do 60 damage times the number of water energy you discard from all your Pokemon. The main way to get that energy back in play is with Superior Energy Retrieval, and in certain cases also use Palkia's VSTAR ability,

This is a very popular build, and I've seen pretty consistent success with it.

The main strategy is to get Baxcalibur on your bench as quickly as possible because its Super Cold ability allows you to accelerate energy to all your other Pokemon. Chien-Pao is the main attacker, since it can do 60 damage times the number of water energy you discard from all your Pokemon. The main way to get that energy back in play is with Superior Energy Retrieval, and in certain cases also use Palkia's VSTAR ability, Star Portal. Palkia also serves as a secondary attacker, and it can do high damage due to most people playing full benches. Radiant Greninja and Bibarel are good tools to keep drawing cards, which will help you set up quicker. Lastly, Lumineon V is very useful because you can get an Irida from your deck, with which you can get a Baxcalibur and Rare Candy to evolve your Frigibax. If it is later in the game, you could instead get a Boss's Order to disrupt your opponent or shuffle your hand with Iono. I've found Skaters' Park to be pretty useful in two scenarios. In the early game, I sometimes find a Pokemon I want on the bench in my active spot (like Frigibax for example) and Skaters' Park allows me to keep the energy after I retreat the Pokemon. After having developed more, if I happen to have a Chien-Pao in my active and one on my bench, Skaters' Park allows me to use Shivery Chill with my active Chien-Pao, retreat it and keep the energy, and then use another Shivery Chill. Lost Vacuum is there in case your opponent places down a troublesome item or stadium card, the worst being Path to the Peak because it completely disrupts Shivery Chill and Star Portal. Lastly I included a couple Super Rods in case you are need to bring back a Pokemon from your discard pile. I recently faced a United Wings deck and wanted to use Radiant Greninja, but because it was my only Pokemon and forced into the active, it got KO'ed, and I had no way of getting it back. Super Rod also helps in case you have some Superior Energy Retrievals in your prize cards and need to get energy from your discard pile.

If this deck could use any improvements, I'd say to probably (1) add Arctibax for more consistency because relying on Rare Candy for Baxcalibur fails sometimes and (2) add Manaphy to prevent bench damage from opposing Kyogres or Radiant Greninjas.

Well, I've really enjoyed playing with this deck, and I wish that I could see my W/L ratio, but PTCGL moment 🤷‍♂️. Have fun!