The underground merchant who trades you spheres for underground treasures such as evolution stones is found in the bottom right corner of the Underground. To get there, fly to Sunyshore City and use your Explorer Kit there. Then go to the bottom right corner of the map where you will find your Sphere Merchant.
The best way to get all the evolutions of Eevee are to 1: breed the initial Eevee until you have the required amount; 2: use the stones related to evolution or level them up during a certain time of the day. You can look for evolution faqs on google if you want more specifics. As long as you breed Eevee you can have an infinite amount.
hulu.com
You don't need action replay or any stupid game shark you find an electrivier thing in cerlean cave give it to electabuzz then trade it and then it evolves. But I can't trade Pokemon on a PC with heart gold.
You can trade for them and find them in the Wilderness.
You cant but u can find a trainer with a Haunter and trade it with a friend, then trade back and u have Gengar.
You catch Pokémon underwater which hold shards, then you trade those shards with the treasure hunter for evolution stones.
underground
You can find evolution stones is various places. If you have beaten the Elite Four, go to the Pokeathlon Dome. In the prizes section, there will be evolution stones. Compete in competitions to earn enough points for the one you want.
Find them xD
You can find all the evolution stones underground by digging. If you get lucky you may dig up some. I find the most common are the thunder stones. I have dug up moon stones, fire stones, water stones, and sun stones. There may be more. I've just remembered! I've also dug up leaf stones but no shiny stones.
You don't.
find the guy who collects shards and trade shards for stones
You can trade athlete points for most of them in the Pokeathlon dome north of goldenrod. Also you can get more from bill's grandfather on Rte 25 by showing him the Pokemon he asks for.
You can't buy the evolution stones in Emerald, but if you find some shards in Underwater regions, like Green Shard, you will be able to trade them for stones of same color (Green = Leaf for example), in Hunter's House located on the way of Mossdeep from Lilycove.
There are all the stones in the Solaceon Ruins. Also, if you get lucky, you can find them while mining underground.
You buy them at the Celadon Department store. hope this helps
Evolution Stones can be found by using your mining kit to go underground. Start digging for treasure, and eventually you will find it!