Terrence Sets Off
The Standard Disclaimer regarding Metroanime and others who have contributed to the pokegirl concept applies.
Also, the Mutio seen here is taken pretty much directly from the Anime Blue Sub. #6.
AU: Terrence is a young Tamer from Indigo, and this is his first day on the job.
This is set into a significantly AU 'verse, in that 'verse's Indigo League. Many things in this story won't work quite the same as in canon, including taming, ferals, and technology.
Mutio are a rather common pokegirl in this.