Sicilian with 2...d5!?
It's rare, but not extremely rare. It's almost as popular as Wing Gambit 2...b4 according to my 8 million game database (9000 vs 9071 games). It's mostly an off-beat line that some people play from time to time in blitz. And it has also been studied a bit. I remember seeing an article on it on some magazine like CBM or NIC or some online article.
The Scandinavian is a pretty respected opening, so 1.e4 c5 2.Nf3 d5 is an excellent way to transform it to a horrible one.
in all seriousness i do not think anyone would play 2.g3 against the sicilian
The patzer playing Black suffered quite a bit to equalize, but eventually he made it.
Pretty much everyone has played 2.g3 at blitz games, and Rapport has even used the move at a few regular time control ones (winning all of them).