wow, wolfkin forest, creative name. Well, I have basic details.
Werfkin - stage 1, evolves into a Rolf after being hit with mass amounts of electricity, or in times of danger, but will soon return to it's original form, and can never stay in its most powerful form for longer than five minutes, unless it has eaten a Petra berry from the tallest mountain in Lethia, then it will gain the ability to control the evolution.
(team rocket's pokédex data)
Rolf - The Spiked wolf pokémon dark/ground
Rolf in this form is uncontrollable if angered, and very powerful. The spikes on is back absorb light, and turn it into pure darkness, which can turn a tree into matter in seconds.
appearance - Rolf in his uncontrolled form (when he has not eaten the petra berry) is shaped like a larger hyena, but has the snout and head of a wolf. It has no human features. It has dark black fur, and large peircing eyes, and it's tail has a rasor sharp blade at the end, which is actually an outgrown bone. Large purple spikes grow on his back, and if one is destroyed, it can instantly grow back.
In his Peace form (once eaten the berry) has a very similar appearance as to his 1st stage evolution Werfkin, although there are some distinguishable features. His hair is down to his neck, and is messy and jagged, so it's easy to assume his hair is shorter. he has no other hair, unlike his previous form, which had hair down his back too. He is much taller than before, almost 1.5 times bigger than an average male adult, although due to his age, his adult form is far bigger. He has wolf - like claws at the end of his arm, which can morph into razor sharp blades, used like a sword, and at his feet are paws, with razor sharp claws for climbing. Other than that, the claws, the tail, and the ears, there are no more new atributes to this new form, except for a very muscular build.
Btw I should mention, that once Scott has ate the petra berry, it is still possible for him to go into his uncontrollable form if shocked by electricity, but silly team rocket don't know that. If you need any more information just say.
More info i just added
Werfkin are known for their excellent deception, and the ability to judge and conclude answers by the expressions of peoples faces and the way they say what they say. It is said that a Werfkin can tell if someone is lying by just the expression on his voice, although this isn't always true. It is easy to understand someone by their actions and their personality, and Werfkin can sometimes sniff out where bad men lurk. If a werfkin doesn't trust someone, you shouldn't either.
They are also known for their excellent athletic abilities, coping with 40mph for a whole day without rest. There sense of hearing isn't as excellent as it may look like, for the big ears reflect sound, making a Werfkin only hear what an average human would hear. The sense of smell is still 100% accurate however.