I think I already have a complete pokedex code for platinum somewhere but it has never worked for me. But I didn't do anything to it so it's not my fault.=) So this code will complete your pokedex. IMPORTANT READ THIS BEFORE USING CODE!!!: when you first activate this code and look at your pokedex I will be a complete sinnoh pokedex. If you had the national pokedex then go back to rowan in sandgem towm and talk to him again. Your pokedex will be upgraded to national and it will be complete, completely, meaning that it even had the option to select different languages to read in. Except for bulbasaur for some reason...
Platinum:
94000130 fcbf0000
b2101d40 00000000
00001654 00010101
00001658 fffcc750
1000165c 0000fdfe
0000137c 10001fff
e00013bc 000000a8
32001fff 70000000
00000000 00000000
08050000 00000000
00000000 00000000
00032000 00000000
02000000 00000000
08000000 90000000
00800000 20000000
00000080 7fffffff
fffffffc fffcffff
7e7ff9e7 ff9c7ef7
ffffffff fffffeff
f8e3e6ff ffffffff
fefffff7 ff3cffff
081fffff dffffffc
ffe7ffff 39ffdfff
00000090 a2ac83fb
e4e4fefe 03020100
07060504 0b0a0908
0f0e0d0c 13121110
17161514 1b1a1918
c0000000 0000000e
00001340 ffffffff
00001380 ffffffff
dc000000 00000004
d2000000 00000000
94000130 fcbf0000
62101d40 00000000
b2101d40 00000000
c0000000 000001ed
20001466 0000003f
dc000000 00000001
d2000000 00000000
IMPORTANT READ DETAILS AT TOP OF POST
Found on AR Code Manager, but I changed it a little.
