after you get the national dext from professor oak the fat man blocking the cave near the exit of victory road well hes gone go through the cave there will be a woman in black and white go with her through the passage once your out you should be at the flower garden
on the left of the Pokemon league but you need a event item or cheat and you have to go through the flower path and shaymin is lv. 30.
Flower Paradise in Diamond, Pearl, Platinum
Shaymin can be found on Pokemon Diamond, Pearl and Platinum in the Flower Paradise. Flower Paradise is in the most North Eastern part of the map at the end of Seabreak Path. This area can only be accessed with Oak's Letter which is an event exclusive item.
in flower paradise
Flower paradise is an island you get to by using an event or action replay.You get to it by getting a letter from a green guy from professor oak.The green guy will be in any Pokemon mart.Follow the instructions on the letter to get to flower paradise.It is above the Pokemon league.For better details,get the letter and it will tell you how to get to flower paradise,and that will tell you where flower paradise is.
go to flower paradise
Use Action Replay == ==
Floaroma Town
Flower Paradise (requires Oak's Letter)
North of the Pokemon league (Take the seabreak path)
noone knows You can't get the gracidea flower in Pokemon pearl you can only get it in Pokemon platinum
the flower paradise on route 224