Hands down Johto Journeys! I thought the orange island song was pretty silly, so when Johto began, first really new region, new world, new Pokemon, the song just fit so well! It sings about everything the series was bringing to us and was just so pleasant and optimistic! The perfect tone for the series.
The follow up Johto songs rank second and third for me as they were all really good!
Don't even make me choose a Japanese theme song... They are each extraordinary and it would be hard to choose! But if I had to, I think the Japanese Johto Journeys song is tied with the first Advanced song. Both are so fun!
Someone once told me that Misty's cameos in Advanced Generation help make it easier knowing that she is no longer a series regular. They couldn't have been more wrong. After she leaves behind Togepi she returns to her gym more alone than ever AND ON TOP OF THAT, her last cameo was in 2005. 2005!?!?!? ITS BEEN TEN YEARS SINCE ONE OF THE CAST WHO STARTED THE SHOW WAS ACTUALLY ON THE SHOW!?!?
Why do we even watch Pokemon anymore