Celadon City is the second largest city in Kanto. Rest at the Pokemon Center the first time you visit so you restart here if you faint. It’s also best to deposit a Pokemon so you have at least one free space in your party. Now, there are a ton of things to do in this town, and they can be done in almost any order.
The large building west of the Pokemon Center is the Celadon Mansion. There are various people on each floor of this building. You can even find the developers of Pokemon Red, Green, Blue, and Yellow here! After capturing all 150 Pokemon, return to the Game Freak developers to receive a special certificate.
You can also enter the Celadon Mansion from the back door. Walk behind the Pokemon Center and through the gap in the bushes to the north. This will give you access to the secret back entrance. Ascend the stairs to the rooftop. Inside the small room on the roof is a man who supposedly knows everything about Pokemon. On the table next to him is an incredibly rare Pokemon named Eevee! This Pokemon can evolve into one of three different Pokemon depending on the stone used. Use a Thunder Stone to evolve Eevee into Jolteon, a Water Stone to evolve Eevee into Vaporeon, or a Fire Stone to evolve Eevee into Flareon. All three stones can be purchased at the Celadon City Department Store, but only one stone can be used. Choose wisely!
The giant building on the northwest side of Celadon City is the Celadon City Department Store. The first floor won’t have anything of importance. The second floor has the trainer’s market.
TM32 Double Team
TM02 Razor Wind
TM07 Horn Drill
TM37 Egg Bomb
TM01 Mega Punch
TM05 Mega Kick
TM09 Take Down
Walk up to the third floor, the TV Game Shop, and speak with the clerk behind the counter. He will give you TM18 Counter. This move allows the user to take damage in battle first, then send back the damage with twice the power! The catch is it only works against normal and fighting-type attacks.
The fourth floor is Wiseman Gifts. You can buy four different stones to evolve various Pokemon, or you can buy a Poke Doll to escape from wild Pokemon encounters. Either way, you should still buy a Poke Doll for a short side quest in Saffron City.
The fifth floor is a drug shop that sells Pokemon vitamins. The left shop’s items will increase a stat during battle, but the right shop’s items increases a Pokemon’s base stats forever.
The sixth floor is Rooftop Square. You can find vending machines with three different drinks. Buy two fresh waters, one lemonade, and one soda pop. Speak to the little girl walking around on the left and give her one of each. In return, she’ll give you three Technical Machines
TM13 Ice Beam
TM48 Rock Slide
TM49 Tri Attack
Why do you need a second Fresh Water? Give this item to one of the guards blocking your path to Saffron City. This will open up all four gates to the largest city in Kanto!
Five buildings are lined up on the south side of town, but only three can actually be entered. The building on the far left is the diner. Speak with the man sitting in the back corner of the diner to receive the Coin Case. This is needed to hold coins from the Game Corner, which is the next stop!
Rocket Game Corner
The large building in the middle of town, just east of the small pond, is the Rocket Game Corner. Play slot machines and earn coins to win prizes. Coins are a completely different form of currency from the regular Money carried around. Coins can also be purchased at the counter. 1000 Money will give you 50 Coins.
One to three coins can be used during each play of a slot machine. One coin allows signs straight across in the middle to count towards a win. Two coins allow signs straight across the top, bottom, and middle to count towards a win. Three coins allow signs straight across and diagonally to count towards a win.
Walk throughout the building pressing A to find coins hidden on the floor. You can also talk with the patrons at the slot machines to get a few free coins. By the end, you should have a total of 250 Coins. Use them to play the slot machine or buy prizes at the Prize Exchange.
The building to the right of the Game Corner is the Prize Exchange. Exchange coins for Pokemon or Technical Machines. One Pokemon, Porygon, can only be obtained here!
TM23 Dragon Rage
TM15 Hyper Beam
Secret Hideout – Route 16
Though this final this is technically not apart of Celadon City, it’s best to write it here before going on. To the west of Celadon City is Route 16. The main path is blocked by a sleeping Snorlax, but you can use Cut on one of the small trees to the north. Follow this road to the west to find a secret hideout. Speak with the person inside to obtain HM02 Fly. This is a powerful flying-type attack, and it also allows you to fly from previously visited towns!
When you’re ready to continue with the story, you can either challenge the Celadon City Pokemon Gym at the far southwest side of town, or you can uncover the secret of the Rocket Game Corner.