Red Shards can be found randomly in Dive Spots (the dark patches on the sea, in case you didn't know) on things such as rocks, or crators.
all the shards for trading are found in the area west of Mossdeep in dive spots
There are an infinite amount of shards that you can get from wild Pokemon and limited ones you can find under the sea in rocks or above in rocks.
If you mean Pokemon Ruby, Sapphire or Emeraldm, they can be traded with a hunter on an island halfway between Lilycove City and Mossdeep City. Pokemon Platinum shards are used to tutor moves to Pokemon on Route 212, Snowpoint City, and the Survival Area.
The color shards you can find in Pokemon Platinum are Red, Blue, Green, and Yellow Shards.
The green shard can be traded for a leaf stone if you talk to the Treasure Hunter on Route 124. Any shards can be traded in for an evolution stone. Yellow Shards = Thunderstones Blue Shards = Water Stones Red Shards = Fire Stones Green Shards = Leaf Stones However there are no shards that allow you to receive a Moon Stone.
They can't be bought. You can find them underwater, or attached to wild pokemon. Chinchou have yellow shards, Clamperl have blue shards, Relicanth have green shards and Corsola have red shards.
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You can find different colored shards when you dive. When you see little dark spots on the bottom of the ocean they're items.
I believe you have to look for Red Gyarados for a Red Scale.
Red shards are found underwater.
There are four shards in Pokemon Platinum- red, blue, green and yellow. They can all be found in the Underground.
Destroy them.Go outside and play sports not Pokemon!