GBA core with RTC?

I’ve searched around, but the only GBA core that seems to exist is spiritualized’s, which doesn’t have RTC support and hasn’t had a release in over a year. I was actually under the impression that RTC support in cores wasn’t possible, but then budude2 just released his GB/GBC core that does have RTC support. So now I’m wondering if it’s possible for GBA.

I ask because I play a ton of Pokemon ROM hacks that take advantage of time changes, and it would be nice to have some of the core features of the Pocket. For example, sleep/wake doesn’t work for Everdrives, and save states / memories are iffy.