That's because G2 was a very... odd generation. It didn't have any animations or cartoons, just one video game. Plus, the toy line was almost exclusively marketed outside of North America. I'm under the impression there were European comic books for G2, but I've never seen them myself.
What a number of people assume was G2 was the 'My Little Pony Tales' cartoon series, but that was basically a second run at G1 with a different setting, but the same art-style. Actual G2 toys and illustrations looked quite different from G1, being much taller and thinner.
The character list for G2 was also completely revamped. To my knowledge there were *no* characters from G1 that transitioned to G2. And none went from G2 to G3. Near the end of G4's run there were some background ponies that showed up that were from G2, I think, but I can't remember off-hand which ones they were.
But the main reason why G2 isn't talked about, is because this site and others came into existence because of the G4/FiM cartoon series, and since there wasn't a true G2 cartoon series to do any comparison/analysis on, it gets skipped as if it didn't happen at all.