Evillordexdeath posted...
It's not crucial to the game or anything, without the clock your berries won't grow (so planting them is a waste) and a few other daily events (lottery, berry hand-outs) will only happen once. Actually speaking of Feebas I think this makes it kind of hard to evolve. You won't be able to go to Mirage Island either. Still almost everything in the game works, I've replayed Gen 3 a couple times without the battery and it didn't change the experience very much.
Weird my copy of Emerald won't even keep the save now that the battery inormal. It erases everything when it turns off.
First time I'd ever had a cartridge battery die so I figured that was nomral.