Drifblim is one of my favorite Pokemon, and it deserves more of a spotlight. In the video games, Drifblim is pretty tanky, so I liked the idea of a hefty GX with an interesting utility.
Drag Away takes reference to Drifloon's Dex entries in the video game, where it attempts to drag kids to the underworld. Drifblim drags the opponent's active Pokemon away, and Drifblim leaves as well. I originally wanted to let the player choose which of their opponent's Pokemon gets switched, but a free Guzma every turn is not exactly balanced.
Spit Up is a move that Drifblim learns in the video game. Without any set acceleration in this fake type format, it's hard to imagine how easily it's attaining that Energy, but with some DCEs and Rainbows, it could make for a decent attack, hitting for 90 on turn 2 before modifiers.
Blow Away-GX plays on how Drifblim is still a big balloon, and balloons blow out air. I think the Lost Zone is fun and should be played with a lot more outside of Prism Stars. I wanted a Pokemon that cuts off any way to get the cards out of the discard. Drifloon can blow things away and scatter them to the winds, and I figured a great way to make use of that is to put them in the Lost Zone.
Its Weakness and Resistance plays off of Drifblim's weaknesses in the video game. Ghost is weak to Ghost, but immune (resistant) to Fighting. Despite being a balloon, Drifblim's Speed in the video game isn't exactly stellar, and to have a Pokemon that can easily retreat without making a modest sacrifice (2 Energy, 1 with Escape Board) would make this hefty blimp a bit too difficult to pop.
Overall, I feel like this card would get roughly the same amount of play as Lycanroc-GX, as the Abilities work similarly, and its attacks can actually prove useful from time to time.