You wake up in a rainbow void after losing consciousness. You can't feel your body, and only can see a reflective surface showing a murky shifting reflection. Is it even human?
???: Hello! Welcome to Origins, and I am your Divine Coach... just call me, Poprok.
Poprok: You may not see me, but I'll be there for you. Now- In Origins, what I do is give you a New Species, and pluck you back into your world in 2003. Of course- Not as a baby, and not in a way where you can live the same live. Another you already exists there. Poprok: Now, Today... you will be...
You feel IMMENSE pain as your body is painfully contorted, shrinking- mutating... but as the reflection clears, so does the pain! And you're left as a cute lil Mew! Your fur is pink and your eyes are large and blue.
Poprok: There you go! Remember, nobody knows who you are, so don't fret about the past!
Your vision clears, and your left in a dark alley in some urban metropolis, back in 2003. You can't see Poprok, and don't hear them , but you feel like they're still keeping you company. For now, you have to focus on how to deal with this mess... You could be bad, good, or inbetween.