Can the DS Lite clock tamper with the Emerald RTC?

Question

So, I just got a copy of Pokemon emerald and a ds lite the other day. I decided that I want to use a Milotic, after a few hours on route 119 I caught a Feebas. while playing I also planted some kelpsy berries, waited a few hours, harvested them and then replanted them. I was gonna turn the DS Lite off for the night after that but then I remembered that I hadn't set the clock yet and it still said January 2000, so I set the clock and went to bed. The next morning I checked and found that the berries I planted hadn't grown. I checked the clock at my characters house and the minutes hand still moves, but daily events don't trigger anymore, berries don't grow, the berry man won't give me any more etc. I had assumed that since they're GB games the DS clock wouldn't effect them. I've tried moving the DS lite clock back, I've let the game just sit around outside the DS for days, I left it on and running for 3 hours and went to check the berries, nothing's changed. Help? I'm not gonna reset either, feebas is too much of a pain to catch again... Also I got pokerus by chance on the cart so... yeah, not resetting.

Comments

The question is phrased as though you changed the month and year on Emerald's in-game clock, but that clock doesn't track the month and year. What did you actually do?

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I think they changed the month and year on the DS clock, not the Emerald clock.

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To clarify, I changed the month and year on the DS Lite clock, after that berries stopped growing.

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When I have time, I will do some tests using homebrew to see if the game saves the DS system time instead of the RTC time. This will be done with an Emerald cartridge whose battery has run dry, but that shouldn't affect our ability to see whether the DS system time is being written instead.