The Battle Pike was the only symbol I have ever earned. Then again I did not get into competitive battling until the fifth generation. I bet if I had been knowledgeable in the third generation like I am now, I think would have been a fair challenge. Also, like mentioned, it is the only real hard part in the game, so difficulty is necessary.
3DS Friend Code: 4012-4489-0237
My Friend Safari: Ground with Diggersby, Camerupt, and Sandshrew.
Black Friend Code: 2709 1047 7352
Black 2 Friend Code: 1120 9435 1441