G2 was only briefly available in the US. After only about two years the line was discontinued, as it does on this page. You can pick up the rest of the line on the G2 Exclusive Ponies page.
The second generation of My Little Ponies was first produced in 1997, until 2002.
The line ended in the U.S but continued on in Europe for a while, to see the continued line go to G2 Exclusive Ponies