Not gonna lie, I was planning on a Lapras originally but then Jabberwock requested some Tropius renders and the 3D model for Tropius was just so much more enjoyable to use than a 3D model for Lapras. Both had to be ripped and textured and such since the models aren't around yet, but I just couldn't make anything nice with Lapras compared to the Tropius scene.
Oh, and I've been sitting on that Zeta Aero Ancient Trait for a while too. The idea with Aero to make it harder for your opponent to stop you from setting up, since Tropius is designed as a supporting Pokemon rather than a main Pokemon. It would've been too overpowered on an attacking Pokemon, so hopefully the rest of the card balances it out. While your Benched Pokemon would still be vulnerable to damage from Bench-hitting attacks, at the very least this Ancient Trait can help deter those attacks from being used. And since this trait is geared towards Flying Pokemon and they're usually Colourless in the TCG, the Ancient Trait banner is 'colourless' too!
The Green Gale attack is just a form of damage-dealing on this supporting card. I don't like cards that do no damage, and it also keeps up a Grass/Flying theme by harming anything that isn't Grass or Colourless - including your own Pokemon.
Phototropism is based on a scientific thing where plants grow towards a light source for their photosynthesis. It's a plant thing, for the plant Pokemon. In this instance, a new Active Pokemon gets closer to the battle and gains energy from it. The Pokedex entry is also inspired by phototropism, too.