I've played Pokemon since the beginning, all the way from Gen I on Red version. During that first journey I was excited to build a strong team, defeat the Champion, etc. When Gold came out I was equally excited because I felt that I could do an even better job on my newest go around, and it didn't disappoint. Not only did I conquer the Johto League and its Champion, I went on to defeat all the Kanto (Gen I region) gym leaders as well, including Blue (which I talked about in the previous post). At the end of that, I was told that I could go to Mt. Silver, the last area of the game.
It was me. Or rather, me from Generation I. The character I had spent hours upon hours with in my original Red version.
This is, bar none, the HARDEST standard trainer battle in the series. His Pokemon are higher leveled than anybody in any of the other games, and they're very well rounded.
His team consists of special Pokemon you acquire throughout the original game (based on Yellow version), which consists of a Pikachu, Venusaur, Charizard (mine!), Blastoise, Snorlax, and an Espeon (Lapras in the remake). After you've managed to best Red, you officially beat the game.
What makes this game so great is that you're essentially conquering yourself. It's the ultimate final test, and an absolute great way to wrap up a game. No other battle has even come close to that in terms of sheer awesomeness.