Walkthrough
Just north of Route 1 is Viridian City. This small town won't have much to it this early in the game, but it is the home to the final Pokemon Gym you will later need to defeat. However, at the present time, the Gym will be locked and vacant. Jessie and James will first be encountered in Viridian City, but they will simply be blocking the road for now and thus won't officially introduce themselves. The main goal of Viridian City at this point is to simply collect Oak's Parcel from the PokeMart and bring it back to him in Pallet Town. There are no Wild Pokemon that can be found in Viridian City, nor any Pokemon Battles at this juncture in the game.
Obtainable Items
Parcel: From PokeMart Clerk Outside PokeMart
Potion: Hidden Near Northwest Bush
TM11: From Man Behind Southwest Chop Down Tree
Revive: Within Viridian City Gym
TM41: Defeat Viridian City Gym Leader Giovanni
PokeMart Items (Through Storyline Progression)
Poke Ball, Great Ball, Ultra Ball
Potion, Super Potion, Hyper Potion, Max Potion, Full Restore
Antidote, Burn Heal, Ice Heal, Awakening, Paralyze Heal, Full Heal, Revive
Escape Rope, Repel, Super Repel, Max Repel
Lure, Super Lure, Max Lure
X Attack, X Defense, X Sp. Atk, X Sp. Def, X Speed, X Accuracy, Dire Hit, Guard Spec.
Post Game
Walkthrough
After defeating the Elite Four and starting the Master Trainers Challenge, you will find a number of Master Trainers throughout Viridian City. In total, there will be five Master Trainers to defeat.
Trainers
Lass Amy (Master Trainer): Level 65 Oddish
Youngster Ken (Master Trainer): Level 70 Meowth
Psychic Angelo (Master Trainer): Level 70 Abra
Lass Hana (Master Trainer): Level 65 Bellsprout
Psychic Anton (Master Trainer): Level 70 Drowzee