Here's a list for Hydef of which G&Ws have dots/bubbles in them.
Have bubbles: Vermin Parachute Helmet Ball (this is the club nintendo version though) Fire Widescreen
Doesn't have: Super Mario Bros Mario Bros Pinball Greenhouse Popeye panorama (well it is panorama i suppose lol) Snoopy Tennis Safebuster Bombsweeper Donkey Kong 3 Zelda Manhole
That said, I've noticed the games that seem like they don't have bubbles, if you shine light really specifically, there are "bubbles", but they're lined up in a diamond/chain link fence manner, and they're SUPER faint. You can't realize them until you shine a light super specifically to get the light to reflect in a way to show they're there.
All of the ones that are listed to not have the normal bubbles, have these, besides Popeye panorama.
