In an exclusive press release earlier this morning, Nintendo announced that while testing Pokemon Platinum they had, in fact, discovered a glitch in which one could obtain a level 100 Shaymin through a few simple tests. Instead of getting rid of it, NoA decided to keep it as an Easter Egg.
According to pokedream.com, Pokemon released an exclusive press release on the morning of April 1st, stating they found a glitch to catch a level 100 Shaymin. They didnt get rid of it, they kept it as an easter egg.
The steps, they say, are simple:
1. Pick Chimchar as your starter
2. Give your Chimchar ro its evolutions a potion to hold
3. Follow the same process to get Spiritomb, except meet 50 people Underground
4. A level 100 Shaymin will appear instead of a Spiritomb
Tell me if this works or not, because i dont have platinum (yet).