yah, I've... erm... "discovered" a lot of GBA stuff that have commodore/amiga-related intros! I think one of the Advance Wars 2 releases shows the kickstart 1.3 screen as part of an intro
EDIT: go here http://gba-nfo.com/gba_home.php
to download most gba intros and nfos. There are no roms here so it should be okay, right?