easy, just follow the steps on this site:
http://gameolosophy.com/games/gaming-on-the-go/
yes there is
yellow shard and red shard and green shard
you have to get a blue shard and then give it to shard dude (i dont know his name) BLUE SHARD=WATERSTONE RED SHARD=FIRESTONE YELLOW SHARD=THUNDERSTONE GREEN SHARD=GRASSSTONE
Yellow Shards and the other color shards are used for trading with NPCs for items or moves. For example in Pokemon Ruby, Sapphire and Emerald they are the main source of evolution stones.
trade a blue shard with the treasure hunter
You first need a yellow shard these can be found using Dive near the Hunter's house, Second give the yellow shard to the hunter he will trade you a thunder stone for the shard. Another way to get a thunder stone is by trading a Pokemon from firered or leafgreen that is holding one to ruby, sapphire or emerald.
You can find these underwater near the hunters house.
I think Clamperls have the shard,but it's completely rare.After you get the shard,go to shard collector's house.
None, stupid.
from mossdeep surf down till you reach a house
Blue Shard- Route 124; Wild Pokemon. Green Shard- Route 126; Wild Relicanth. Red Shard- Route 124; Wild Pokemon. Yellow Shard- Route 126; Wild Pokemon.
you basically look for yellow dots on the map. the yellow dots are iron ores and/or sapphire shards. you have to attack the dome like structure to get it.