This story takes place in the episode Benwolf of the original series season 3 episode 5. Male reader replaces Ben while Gwen got the Omnitrix while stretching her legs in the forest that night.
Y/N,Gwen and her granpa visited native american village.Granpa was talking to Mr. Green while Gwen and Y/N were looking at the souvenirs.
Y/N:Find something you like?
Gwen:No.Great for history presentation but not so great to look at everyday.
Y/N:Unlike you.
Gwen:Oh stop it.
Gwen playfully punched Y/Ns shoulder making them both laugh.Ever since the summer started they started dating.It didnt have anything to do with the Omnitirx, just long time crush.They walked back to Granpa Max so they wouldnt get left behind.
Mr.Green:Thats my granddaughter Kai.
Max:Oh Wess,last time I saw her she was barely walking.Now look at her.
They were reffering to a girl with long black hair,clothes in the stlye of British flag and jumping on one leg at the time.
Mr.Green:Shes performing the ceremonial Navajo dance.
Y/N:No offense but its not really that intetesting.
Gwen:Y/N,be nice.Hes just got used to adventures this summer.
When the girl stopped dancing everybody aplaud her.She walked to the groups and smiled while tucking the hair behind her ear when she passed by Y/N.He tought nothing of it but Gwen crossed her arms and looked away.
Gwen:Youre sure youre not making a rain dance?
Kai:Positive.Why?
Rain started falling as well as strikes of purple lightning began attacking.
Gwen:Thats why!
Everyone rushed to the Rust bucket as a tall creature appeared out of nowhere and the flood started.Gwen saw a mother and her child being swept by the water so she turned into Ripjaws and swam after them to save them but she saw the creature stealing the satelite.Once the rain and flood stopped everyone gathered.Gwen then took notice that Y/N was wet and Kai was hugging him.
Gwen:What happened?
Kai:Your brother rescued me when the flood came.
Gwen:Hes not my brother.
Timeskip museum
Mr.Green told the group about the legend of yenaldooshi the skin walker.He said that the only men are allowed on the hunt and went with granpa Max.When they left Gwen pulled Y/N behind a wall.
Gwen:I have to sneak out.What if that Navajo werewolf is an alien.We saw hundreds of them.Just make sure Kai doesnt get suspicios.
Y/N:Why cant I go too.
Gwen:I dont want you to get hurt.I can take care of myself.Dont worry,Ill be right back.
With that she ran to the nearest exit while Y/N walked back to the previous room to see Kai glaring at him.
Kai:Where is Gwen?
Y/N:She um,had to go to the bathroom.All the water today you know.
Kai:So its only two of us?
Timeskip after Loboan scrathed Gwens Omnitrix.
Y/N:You made it.Everything in one piece?
Gwen:Yes but close.Anything happened while we were gone.
Y/N:Turns out Kais afraid of the dark.She followed me closly to here.
Gwen:You,ugh,dont say.
Gwen began using her long nails to srathc her entire back,throat and even legs.
Y/N:Are you OK?
Gwen:Yeah,just really itchy.
Her hair grew to her chin and her sking turned slightly orange,her ears grew longer and her nails turned to black claws.
Y/N:Max,somethings wrong!
Gwen:Oh noooooooooo!
Mr.Green:Were you biten by the Yenaldooshi?
Gwen:When I was Wildvine.But it didnt even broke the skin.Or is it root?
Mr.Green:The Yenaldooshi can create others in its exact image.And when it does,those followers will seek to destroy those closest to them.
Y/N:So how does Gwen un-wolf?
Mr.Green:There is a spell to stop the Yenaldooshi.
Gwen:With a silver bullet?
Mr.Green:Thats in the movies.
Y/N:Where else would it be.These things are supposed to be myths.Well,so are aliens actually.
Mr.Green:You must dip the silver pendant in the juice of Árbol del Matrimonio cactus, and place it on the against its heart.And we must do it before tonights full moon,or you could remain like that forever Gwen.
Gwen:(Gulp)Forever.
Kai:Navajo also belive the Yenaldooshi is a god,or a goddes in this case.
Gwen:Maybe it wont be so bad with a little extra hair.
Kai:But then again the Yenaldooshi attacks its closest.
Y/N:(Gulp).
Mr.Green:I will get the pendant.
Gwen:Hey,is anybody else hungry.
Her gaze soon falls on a cow grazing nearby.They enter the Rust bucket where Gwen prepares a meal of milk and raw eggs which she eats in the most mess inducing manner.She lookes up to see bits of food everywhere and on Y/N face while Kai hid behind him.She grabs a napkin with her teeth and offers it to Y/N.
Gwen:Napkin?
Y/N:Thanks.I think I found something about the cactus.
Gwen runs to the fridge and opens it wide to satiate her hunger.
Gwen:Lets see what else I can wolf down.Get it?Get it?
Strange sound was heard causing Y/N and Kai to look at Gwen who grew,with bumps on spine,darker orange fur.She rose up with a roasted chicken in her heads,bone in her mouth and cute expression on her face.She then ate the whole chicken.
Kai:Youre looking more and more like Yenaldooshi.
Kai:(Then Y/N will be mine).
Gwen:Well,I still feel like just me.
She sniffed the air and grab the roof of the open doors and jumps on the Rust bucket from where she saw a jackrabbit which she began to chase.Kais granpa and granpa Max returned with the news of Yenaldooshi stealing satelites.Two of them and Gwen wolf go after it while Kai and Y/N look for the cactus.They eventually learn that it wasnt a Navajo werewolf but an alien werewolf.They fought the Yenaldooshi in lava filled cave and get out thanks to Gwen and Cannonbolt.At the end Mr.Green took granpa Max to the museum for souvenirs while kids said their goodbyes.
Kai:I have to be honest Gwen.I was kinda hoping you would turn into Yenaldooshi so I can be with Y/N.
Y/N&Gwen:You what!?
Y/N:Thats awfull.And shes my girlfriend.
Gwen dialed in a new alien and turned into Wildvine.
Wildvine:You Navajos like nature righ.Get in touch with my nature!
As soon as she said that her claws grew longer and sharp thin thorns sprouted from her body.Y/N ran in front of her with his arms in the air.
Y/N:Gwen stop!This isnt you.
Gwen:Didnt you heard what she said?!
Y/N:Shes not worth it.
The young couple walked away from the selfish Navajo 10 year old and into the rust bucket.
Y/N:You know that new form really suits you.What did you call it again?
Gwen:Gwenwolf.You really thinks so?
Y/N:Of course.It was both cute and fierce.Like an otter or a tasmanian devil.
Gwen:Thanks.I guess.
Y/N:Hopefully youll get a chance to use that form soon.
Gwen:Oh youll see planty of her.
Their lives went in the same manner as in the series.Except the new Omnitirx kept the loboan DNA so Gwen didnt have to wait until she got the Ultimatrix.Y/N noticed she liked to overuse Gwenwolf even if it wasnt the best choice.Righ now they were hunning on a couch and watching a movie together.Camera moves to show Y/N face iluminated by the TV.
Y/N:Gwen?
Gwen:Yes Y/N?
Y/N:Have you been overusing Gwenwolf just for my benefit?
Gwen:I have no idea what youre talking about.
Camera then zooms out to show Y/N was being hugged not by Gwen but by Gwenwolf.
Y/N:You sure about that?
Gwenwolf:Maybe a little.I know you dont mind.
Y/N:Far from it.Just make more responsible choices when youre transforming.
Gwenwolf:Anything for you.But no promises.
Gwen wolf than licked Y/Ns cheek and nuzzled her dark orange snout between his head and shoulder.
Y/N:That tickles.
Gwen:Does it now?
Y/N:Please dont.
Gwen:OK.But you didnt said anything about the tail.
She then tickels his stomach with her tail getting a loud laugh out of him.