Pokémon FireRed and LeafGreen/Cerulean City

There is much to do in Cerulean City. You will have to battle your Rival, beat a group of trainers, stop Team Rocket from their usual mischievous deeds and of course earn another badge. The way out is blocked by a guard, who will move away after you visit Bill at his house on Route 25.



Rival battle #3
When you go north, attempting to go on the bridge to Bill's house, your Rival will stop you for a fight. After the battle has ended, he will give you a Fame Checker.

You'll face the first lineup if you chose as your starter, the second lineup if you chose, and the third lineup if you chose.

Your rival can be difficult to defeat, but with good Pokémon you will win. His Pidgey evolved into Pidgeotto and can be defeated with Electric or Rock-type moves. His Abra has no offensive attacks, so use a weaker Pokémon in your party to defeat it for XP. Rattata can be defeated by Low Kick or Double Kick, but beware of.
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Cerulean City Gym
You might want to wait with the gym battle after you've visited Bill, since Misty can be a tough opponent at this point of the game. After you beat Misty you will be able to teach TM03, to a Pokémon. You will also be able to use HM01 Cut outside of battle.

Misty has two Pokémon: Staryu and Starmie. Staryu should be piece of cake, it falls easily to couple attacks and isn't too strong. Starmie is however going to be tough one to beat: it has very powerful stats at this point, its does major damage (and has chance of confusing your Pokémon) and it can heal itself by using.
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 * If you have, first use and then attack with . Leech Seed steals HP from Starmie and heals your Pokémon at the same time. You can also use  to put Starmie asleep.
 * Pikachu learns at level 26, which is a powerful Electric-type move. It easily takes Starmie down in one or two hits.
 * Wartortle learns a Dark-type move at level 19. Since Starmie is part Psychic type, it's weak against Dark-type moves. Wartortle has decent defenses to take incoming attacks, and he also resists Water Pulse. Similarly,  learns Bite at level 16.
 * You can get Magikarp and evolve it into Gyarados at level 20. With Bite it should take one or two hits.
 * If you don't own any of these Pokémon, save the gym for later when you have Pokémon leveled up enough. In Leaf Green, you can also catch, which can be found on routes 5 and 6. Fire Red yields in the same route, which is less powerful, but can still give you a slight edge.

Bike Shop
You may buy a bike from the shop at the southwest corner of the city. However, it costs 1,000,000, which is more money than you are capable of holding. In Vermilion City, you will receive a Bike Voucher that you can exchange in this store for a free bike.

Leaving Town
When you are finally leaving Cerulean from the house where the guard used to be, a Team Rocket Grunt will stop and fight you. When you defeat him he will give you a TM28.


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Trades
At the house west of the PokéCenter there is an old man who will trade Pokémon with you. You will get a Jynx at the same level as the Poliwhirl you have given. You won't be able to do this trade until much later in the game, after you get the Good Rod or the Super Rod.

Items

 * Rare Candy (Hidden behind the house in the north west corner of the city, between two flowers)
 * Powder Jar (Given to you by the old man in the right of the two northern houses, but only if you already have at least one berry)
 * Fame Checker (Given to you by your Rival after you fight him)
 * TM 03 (Given to you by Misty after you beat her)
 * TM 28 (Given to you by the TR Grunt after you beat him)