As you know that after 1 year in Pokemon RS, your berries are unable to grow anymore, right? Well, guess what: you've got help, from something you didn't know. Don't contact Nintendo about this when your "battery" dies...
Here's what I mean. In the Nintendo Power issue #177, on page 110, it states this...:
Transfer Jirachi to Your Team
...blah, blah, blah
As a bonus when you import Jirachi to your Ruby or Sapphire Pak, you'll receive a small blessing for your berry gardens in the GBA games--they'll keep producing the useful fruits FOREVER. If your berry gardens dry up after your first year of gameplay, you'll want to have Jirachi do a little spring gardening for you!
Meaning, when you get the Bonus Disk of Pokemon Colosseum with your pre-order, transfer Jirachi from this disk will grant you to produce more berries by fixing the "bug" in RS!