Well, it's not "new" fanart, but I did do this some time ago.
Here's one of Super Misty:
Basically, I based it off of the Super Transformations/Super Sonic/Super Saiyans from Sonic the Hedgehog/Dragon Ball Z, and basically, she gets it from restoring the Sea Crown (As a similar effect happened with Ash, though this transformation is exclusive to those with genetic relations with the Misties [Misty's origin race].).
BTW, just something to note, while posting Misty fan art is good and all that, and is a hint at liking her, no offense, but it's not the definite way of being a Misty fan, especially if the person drawing fanart of her actually hates her. I mean, one time, I was searching images on the web and I saw a fanart of Misty being mauled apart by a giant carnivorous looking Pikachu. Can you even think of a Misty fan doing that? I mean, it's fanart, and yet, it implies that the author hates her.). I'm not saying that those who draw fanarts of Misty are never Misty fans, just that it's not set in stone that they are.
Anyways, I may not be making it known that we should boycott, but that does NOT mean that I'm giving up on Misty returning. I'm just trying not to mention it much as disaster happens anyways (Then again, on BMGf, people try to pick a fight on me, claiming I'm making whatever topic I am on a Bring Misty Back topic, even if Bringing Misty Back was barely even in the post to begin with, so it probably doesn't matter anyways.).
As for things Misty did on the Show, well, she got everyone out of the St. Anne, she saved Porta Vista (or Hatoba Port, in the japanese version), I think she won that swimsuit contest and paid repair damages to Moe's dock, she also was the one who stopped Gastly (in one sense), she was the one who stopped the backpack thief, she was probably the one who reacted first to the bomb in the fair, as well as realized what happened to Ash, she won the Princess Festival, she saved Cerulean Gym's show, got Ash to new Island, was the reason why Ash got to face Blaine in the first place, was the one who foiled the Scam by Butch and Cassidy, found out most of the TR scams on the rare occasions that Ash and his friends weren't even fooled at all, was the one who encouraged Hoothoot to get them through the forest, was the one who got Heracross to actually stand up to the Pinsirs/Team Rocket, ranked top 8 in the Whirl cup, won the Seaking fishing tourney, saved Egans newly caught Magcargo from Team Rocket, won the Alto Mare race, stopped Team Rocket's control braces, saved the Corsola farm, helped save the Hoppip and Oddish, helped everyone evacuate from the collapsing Kabuto Island, among other things. Heck, if it wasn't for her, none of the group, not even Ash, would have gotten as far.
BTW, I'll probably be out of reach friday through sunday, as I'm going to a wedding.