Pokémon Gold and Silver/Cianwood City

'''You have to head to Cianwood City to get the medicine for the Ampharos in Olivine city, and while you're there, you should pick up the Gym Badge too. You'll get something very cool if you win. Crush the boulders near the top of the city to find some interesting stuff.'''

Get Jasmine's medicine
The pharmacist in the small building at the bottom will give you the Secret Potion that Jasmine needs. If you then leave and come back, he'll start selling a small selection of normal medicines, including the handy, space-saving Full Heal, which can cure any status condition.

Give Shuckle a good home
The guy in the center house is so concerned about his Pokémon being stolen that he'll give it to you for safe-keeping. It's a named Shuckie, and as long as you keep it happy, it's yours to keep.

The Pokémon Photographer
If you have a Game Boy Printer, the guy in the house directly above the Gym will be happy to take free photos of your Pokémon. The printed versions show the Pokémon's picture, its moves, and all of its stats.

Fly
Talk to Chuck's, the Cianwood Gym Leader's, wife and you'll find she thinks her husband is spending too much time at the gym. Once you beat Chuck, talk to her and she gives you a very valuable item: HM 02 (Fly). Fly allows you to visit any city you've previously been to, including Olivine, which saves you the entire trip back.

Eusine and Suicune in Cianwood?
A new Crystal-exclusive event occurs when you approach the small alcove in the north part of Cianwood Island. Suicune appears, and then dashes away just as quickly. Where Suicune is, Eusine is never far behind, and he'll challenge you to a battle to earn Suicune's respect (although it seems pretty clear that Suicune couldn't care less.)

Eusine has a tough mix of Pokémon, so be ready with a well-rested party. A strong Normal Pokémon with a good Dark attack like Bite is ideal for dealing with and.
 * Mysticalman Eusine:
 * and [[File:Pokebuck.png]]2500
 * and [[File:Pokebuck.png]]2500
 * and [[File:Pokebuck.png]]2500

The Pokémon Seer
This building contains the Pokémon Seer, a character new to Crystal. She'll look at the top Pokémon in your roster and tell you where it was caught, when it was caught, what level it was, and which trainer originally caught it. Who cares, you ask? Well, if you take that Pokémon back to the same area at the same time, and fight with it a bit, its Happiness will improve.

Rock Smash
If you have a Pokémon that can use Rock Smash, head to the north end of Cianwood and use Rock Smash on the breakable rocks. Under many of the rocks you'll find Krabbys, but the rock in front of the house contains a Revive, and one rock farther down hides a Max Ether.

Gym Battle 5: CHUCK
You need to use Strength, which the sailor in gave you, to make it to the Gym Leader battle. Push the two outside boulders up, and then push the middle boulder to either side.

All of the Pokémon in this Gym are Fighting-type, but there's no simple trick to getting through it. Most of the fighters have non-Fighting type attacks to take care of Ghost Pokémon, so pack your roster mainly with quick Psychics (who can get a K.O. before they're flattened by the counterattack) and tough Flyers (especially ones with Flying attacks).

Try to knock out Chuck's Poliwrath early, before it attacks with Dynamic Punch, which will almost certainly confuse your Pokémon. After defeating Chuck, you get the Storm Badge, which enables you to control Pokémon up to level 70 and use Fly outside of battle, and he also gives you TM 01 which contains Dynamic Punch, a move that hits only 50% of the time, but confuses the enemy every time it hits.