Thanks! Sounds cool!
I hope there's some examples in documentation how to use VRAM and copy some sprites.
223 days ago(+1)
Not directly, it's quite low-level. Please check the documentation chapters "Memory Access" (COPY command) and "Hardware Reference" (about character data).
The call will look somehow like this, but you'll have to adjust the parameters:
COPY ROM(3),$400 TO $8000