You forgot Laser Ghost, Ecco The Dolphin, Psycho Fox, Dragon Crystal, Enduro Racer, Impossible Mission, Ninja Gaiden and Wonderboy in Monsterland.
Probably intentional, seeing as those titles are standard cartridges.
SMS games came in two formats... Cards and Cartridges. The card slot were dropped in the later revisions of the SMS consoles *(SMS 2). The 3D glasses also used the card slot for the 3D games found on carts (possibly for power?)The cards tended to be very limited games (maybe quick ports from the SG-1000?)