Sooooooooooooooooooooooooooooo, there is another character who gets a Verdant Transformation, and before anyone says anything, no normal Trainer cannot use Verdant Transformation. Because #1, the Trainer must have a Verdant Soul, which there are only 4 in existence, and #2 the Trainer must be able to control Makyo Energy; which again, isn't something a random Trainer can do. Also, the other 3 characters that get a Transformation are not going to be in this game, they will be in the 2nd game.
Verdant Soul = The soul of a person who wishes to pass on their power to another in the form of a crystallized orb which merges with the compatible Trainer. The Trainer's soul that becomes a Verdant Soul chooses who it will be compatible with. Their personality and memories reside inside of it, and as a result of a merging event, becomes one with the selected Trainer.
But, this is the 3rd Verdant Transformation out of 4. This is Marissa Brennan's Verdant Transformation, and out of all 4 of the transformations, hers is the most... dangerous. I say that, because the Verdant Soul that she uses, is the soul that belongs to a certain character, who's soul turned into it; and that person wasn't exactly... good. But at the same time, that person did try to change, and wanted to be forgiven at a certain part of the game's story for his recklessness and becoming evil. That said, the Verdant Soul that is used has a duality to it, in that it is made up of the souls of two people's living souls.
What makes it dangerous is that if Marissa is in danger or is pushed to her limits, the negative aspects of the Verdant Soul will make both the Trainer and Pokemon lose control, and will be consumed with rage. That said, in the second game she learns to control this.
Because of the duality of the Transformation she has both a very transient, yet terrifying appearance. Her eyes become red with blue, bio-illuminescant irises and all of her teeth become sharp canine's. The power output from her Transformation is slightly more than Vice's, and is far more dangerous. Anywho, here is the sketch.
Who does the Verdant Soul belong to, you may ask? That's for you to find out.