Pokemon found on Route 2:
Rattata
Pidgey
Weedle
Caterpie
Pokemon found in Viridian Forest:
Weedle
Kakuna
Metapod
Caterpie
Pikachu
Items found in Viridian Forest:
Antidote
PokeBall
Potion
Now it is time to start collecting Pokemon. Pidgey and Rattata are more plentiful along Route 1, so head back there to collect them first, then go north to Viridian Forest. Remember that you must weaken a Pokemon first before using a PokeBall to capture it. If your target is too strong, it will break free. On the other hand, if you drain all the target's energy, it will faint, and you won't be able to collect it. Keep in mind that you can't capture another trainer's Pokemon. You'll run across several trainer's in Viridian Forest, so build up at least a couple of your Pokemon before challenge them. There's only one main route through the forest, so you shouldn't have much trouble finding your way out.
Notes:
1. Rival trainer's will often challenge you as soon as they see you, and you won't be able to avoid combat.
2. Pikachu is one of the Pokemon you will find in the forest. If you capture one, it will be especially helpful in Cerulean City.
