Hey Wolf!
If you go into your Key Items, find your Pal Pad and select 'Use', you should be presented with an option to check your friend code, or register a friend, etc. I'll PM you my friend code shortly.
I've misplaced my Pearl cartridge, but I just checked on the 'net and apparently trading from SoulSilver to Platinum works.
I don't have a female Eevee hatched out right now, so I'll get to work on cookin' one up and then we can set up a trade.
Also, if there are any other Pokémans you're after, just say the word and I'll see if I can help you out. I have a Cyndaquil and Togepi in storage that I'd be able to send over too.