The original large gameboys had a lock that utilized the slot via the power switch. The pocket removed the lock therefore allowing the non slotted Color games to be used in a pocket gameboy.
Actual proof of what? That Dr. Disrespect sent private messages to a minor? I guess I would take him at his own word since he tweeted about it admitting it hours ago.
I’ve played maybe an hour or 2 on my PS2 maybe a year or two ago and the mechanics sounded so amazing, but in execution they don’t seem to work as intended like you said.