This includes some stuff that wasn't seen in the comic!
This is the only piece of Concept Art I have for Season One - Amber's final outfit. I guess for Season One I made stuff up as I went along way more often...
Original concept for the protagonists of Season Two, plus their ages, which I don't think are stated in the comic itself (but knowing Amber was 16 in the previous run, and this takes place 3 years later, you could have guessed her age at least!)
Concept for Other Amber and Daisy in Season Two. As you can see, they resemble their original Touhou counterparts a lot more!
Original concept for Maxie, who never showed up in the comic proper. He kinda looks like Christopher Walken a little bit...
You could have guessed, based on the chapter about the Hoenn creation myth, that the three gods featured there - analogous to Kyogre, Groudon, and Rayquaza - were going to be Suwako, Utsuho, and Tenshi. Indeed, Touhoumon Purple features special versions of these characters who exist to fill the roles of the Weather Trio. But for my comic, I wanted them to resemble ancient gods, and redesigned them accordingly. I'm honestly not too fond of the Utsuho, but I think the other two are pretty much perfect.
Lyla and Amber sprites - edited from FireRed/LeafGreen's female Ace Trainer and Team Rocket Grunt, respectively. I actually had edited my files to have these appear on each protagonist's Trainer Card.