Well, In Pokemon Platinum you are able to find shards in the underground, a place obtainable after you get the underground kit in Eterna City, and sometimes when you are using the Item Finder( Dowsing app) you are able find them hidden in places. Specific Pokemon can hold shards. I would suggest going to www.serebii.net for more information. They have a wide variety of information about Pokemon all over the world from video games to episodes to Special Events. Try going there and I hope that my answer was helpful!
Platinum, Pt, it's atomic number is 78
A diamond that has been crushed, leaving shards or diamond dust.
Platinum is malleable if alloyed with gold
There are four shards in Pokemon Platinum- red, blue, green and yellow. They can all be found in the Underground.
You can get them underground.
you can find them underground
The color shards you can find in Pokemon Platinum are Red, Blue, Green, and Yellow Shards.
You cannot find it as a hm in platinum but some Pokemon can learn it naturally. You can get from the move tutor on route 212 for 2 red shards, 4 blue shards and 2 yellow shards. HOPE THIS HELPS
You need 6 Red Shards and 2 Green Shards in order for the Move Tutor in PokÃ©mon Platinum to teach Ancientpower to 1 of your PokÃ©mon.
Mining and digging Underground.
you can go underground if you have the mining kit and search there and you'll find all kinds of shards.
shards can be used to trade with other people. in return, they may teach your Pokemon moves. there are 3 move tutors in Pokemon platinum that will teach your Pokemon moves in exchange for shards in a specific color.
There is a move tutor west of pastoria city who will teach it to one of your Pokemon for 6 blue shards and 2 red shards ;)