Pokémon Red and Blue: Cerulean City

If you are playing on a Super Game Boy or Game Boy Color, then the first thing you will notice about Cerulean City is its eponymous blue color.

Starting right off, the man in the northwestern house will tell you the unique benefits of each of the region's gym badges. The BoulderBadge you already have increases your Pokémon's Attack by 10% and allows you to use the HM move Flash outside of battle. The next badge, the CascadeBadge, will allow the use of Cut outside of battle, and will make traded Pokémon obey your commands up to level 30, where they might otherwise refuse to attack, use the wrong move or go to sleep in battle. Go through the back door of this house and examine the area behind it to find a hidden Rare Candy.

The house next to the gym contains a man who wants to trade the only Jynx in the game for your Poliwhirl. Both of these Pokémon will be explained when Poliwhirl becomes available.

The southwest building is a steeply priced bike shop. You can never have more than P999,999, so the P1,000,000 bike is off limits to you for now.

The Pokémon Mart sells the following items:

• Poké Balls - P200, be sure to stock up.
• Potions - P300
• Antidotes - P100
• Awakenings - P250
• Burn Heals - P250
• Parlyz Heals - P200
• Repels - P350, these would have been most useful before the cave, because they prevent you from encountering Pokémon of a higher level than the one at the top of your party for 200 steps a can.

You have two options here. You can enter Cerulean's Gym Gym (which is really just a Gym) or you can head north onto Route 24. You can get as far as the next town without collecting Cerulean's Gym Badge, but you won't be able to advance to the third badge until you get this one.

Enter Cerulean Gym

Proceed to Route 24