AND THUS, THE ADVENTURE BEGINS. WARNING, NARRATIVE FLUFF. I had too much fun summarizing the first day.
Chapter I: Cue the Overly Cliche Title about Beginnings and Adventures
So this kid named
Raphael, aka "the Protagonist", rolls out of bed and wanders about his room for a bit (during which he finds one[1] potion in the PC). He gets dressed, comes downstairs, and his Mom tells him Professor Oak is looking for him.
FANTASTIC! Raphael wanders around Pallet Town, taking his sweet time, during which he meets his rival,
Samuel, and Sam's older sister Daisy.... and then he tries to leave town because the professor has obviously stood him up and is no where to be found.
BUT WAIT! Oak shows up out of no where like a ninja, warning the young protagonist about the dangers of wild grass without a Pokemon, and thus Raphael is dragged back to the lab to get his starter. And since this IS a
Poison Type monochallenge, it makes sense to pick Bulbasaur!

•Terrathus♂
•Grass/Poison
•Lv. 5
•Tackle, Growl
And of course, Samuel picks Charmander
the lil' rat, and challenges Raphael to a battle, where he wipes the floor with poor Terrathus and then walks out the door like the brat he is. Anyway, it's time to leave town after Raphael baws at his mom about his loss and heals up poor Bulbasaur.
Raphael makes it to Viridian City and tries to go into the Pokemart to do the sensible thing and buy some stuff, only he has a package to deliver! He goes back, trades the custom Pokeball for a Pokedex, and is on his merry way after getting the Town Map...
Chapter II: Makin' a Team
Luckily for Raphael, he has a good number of Pokemon with a poison type to their name to make for his team early on. On route 22, he gains both the male and female Nidorans:

•Freya♀
•Poison
•Lv. 3
•Tackle, Growl

•Thor♂
•Poison
•Lv. 3
•Tackle, Leer
And thus the first wave of grinding begins....
Once everyone's at level 6, Raphael and company head into the weely scawy Viridian Forest to get a Weedle. This task is accomplished after beating up Pikachu, Caterpie, and Metapod:

•Beedra
•Bug/Poison
•Lv. 3
•Poison Sting, String Shot
And further into the woods they go, beating up Bug Catchers and slowly making it to Pewter City...
Chapter III: HOORAY WE'RE HERE-- no, wait, more Level Grinding....
And the team reaches Pewter, where Brock awaits... only for Raphael to remember that his team is under leveled and needs to be grinded up to level 13. The Narrator (aka the player, DGexe) insists Terrathus learns Vine Whip before whipping Brock's team into shape...
And thus, the grinding begins, until this end result is had:

•Beedra
•Bug/Poison
•Lv. 13
•Poison Sting, String Shot, Fury Attack

•Freya♀
•Poison
•Lv. 13
•Tackle, Growl, Scratch

•Thor♂
•Poison
•Lv. 13
•Tackle, Leer, Horn Attack

•Terrathus♂
•Grass/Poison
•Lv. 13
•Tackle, Growl, Leech Seed, Vine Whip
And now I'm about to go pwn some Rock Types. HOOHAH!