I have a tonne of SMS carts, i think its the only system that has more PAL then NTSC titles?? Anyhow, heres some of my faves:
R-Type
Bank Panic
SPeedball 2
rc grand prix
Choplifter
Wonderboy, 1,2,3,4
sonic 2
ms pac man
paperboy
gauntlet
Rastan
Y's
Outrun
Space harrier
I have about 300 + counting so im sure i like more, just need the time.
BTW all you PAL ppl should really mod this gem to see how good it really is