Palkia G Lv X is too much of a energy hog in my personal opinion. I would never use his poke'power, and that would be a waste when playing against Gengar, since Gengar decks eat Blastoise alive.
4 Energy and discarding 2 for an attack that does 80 is just too costly to me, IMHO. Blastoise's Double Launcher cost the same, but spreads for 60 against 2 pokemon on the bench.
After alot of play-testing, this seems to be the best line-up with the proper techs, and number of cards in the line-up.
I will give him a shot though. See how well he works with the synergy of Blastoise and Delcatty.
@ Mad- I did try the Lumineon SF. He does work well in the deck. The free snipe sets well with Blastoise's Double Launcher against techs like Messpirit, Azelf, Uxie, Claydol, etc.. but only problem was it slowed the deck down a little bit. Lumineon got stuck in the active spot on a few games and ended up getting wasted fast. A very enjoyable experience though, so if you have more suggestions, please feel free to toss them in