None in Pearl, none in Platinum. I haven't gotten that far in Platinum yet, but in Pearl...well, lets just say I got a message sent to me when my level 51 Staraptor was defeated by a level 51 Dustox. I had a type advantge, yet I was still miserably pwned. I managed to beat it, but as the battle went on, I decided to start over and keep stopping to massivly level up(which is why I can barely stand to play them...all that leveling up gets boring.. The D/P/Pl Elite Four have to be the strongest I've ever seen the Elite Four...well, next to the R/B/Y/FR/LG Elite Four. But if I recall, Loreli, the first member of the Gen I Elite Four didn't start out with a level 51 Pokemon. Nor did any of the other first members of the Elite Four.