MAMEWorld Forums - EmuChat - Brain (1986, Coreland) questions

Just a couple of questions about this cool obscurity:

1: I remember years back in MAME I could have sworn that during the attract mode there is a screen that shows all the items and enemies and stuff, but in all recent MAME versions the game doesn't show this screen. I downloaded various older versions of MAME but even they didn't make the game show the screen. I thought maybe my memory was confusing it with another game or something, but then I noticed the MAWS entry for the game (http://maws.mameworld.info/maws/romset/brain) says "There are certain UFO's and aliens you can obtain them from, just watch the game demo's to see them." which sounds like maybe this screen did exist.

Messing some some older versions of MAME did show some emulation inconsistencies though, in the most recent MAME version the demo play gets to the end of stage 1, but in older versions the demo get killed near the beginning. The 2nd demo play where it shows a different stage is also different in old and new MAME versions. I think the oldest MAME version I have tried the game on at the moment is 0.83.

2: A couple of Japanese sites list the game as unreleased, I'm curious as to how MAME came across a pcb of it, and if perhaps there is a board out there with a correct checksum?