After a couple days of pestering Nintendo on thier forums one of the pokemon fans who was also upset there was no update was actually able to get in touch with someone with some insight. This is the email they received:
"Hello, While we appreciate your interest, there are no plans to offer an update to My Pokemon Ranch to make it compatible with newer Pokemon games, such as Pokemon Platinum. Additionally, there are no plans to offer the Japanese update in North America. I will, however, be certain to pass along your email on to the appropriate department for further review. For the latest Pokemon news and information, please keep an eye on the official Pokemon website (www.pokemon.com).
Sincerely, Nintendo of America Inc."
So that's it for now... no update for Ranch and no reason to even buy Ranch if you have Platinum. I will keep following up on this with my detective work and attempt to get some reasoning why we weren't offered the same update that Japan has. I understand why we don't get as many pokemon events as Japan, seeing as it's easier to host events everyone can attend due to thier country being smaller and having a lot of public mass transportation (trains). The pokemon giveaways don't affect gameplay the way the incompatiblity with an entire game affects the usefulness of My Pokemon Ranch. I'd even be willing to buy the update for some Wii points if I would be able to deposit Platinum pokemon. Xbox 360 has game add-ons that can be purchased if the person wants them... I don't see why the same can't be done for the Wii.
Anyway, thanks to Nitendo tech forum member DUKE5567 for getting this information and posting it. To read the full message board post by SHADOWMIDNA, click here.