I use this for B/W:
Black version:
020195B4 FC24F7E8
02001E00 73B4B4FF
02001E08 24017E88
02001E0C 76884060
02001FFC BDF8BCFF
White Version:
020195D0 FC16F7E8
02001E00 73B4B4FF
02001FFC BDF8BCFF
02001E08 24017E88
02001E0C 76884060
Mark your Pokemon in the PC to get Pokerus.
Platinum code:
120776C2 00004288
94000130 FFFE0000
120776C2 00004280
D2000000 00000000
"To activate go into a wild pokemon battle and run, when it says "got away safely" hold L+A"
Let me know if the Platinum code doesn't work.