The new season will be called "Pokemon BW: Adventures in Unova"
Probably Grey that is if season 16 is after Pkmn black and white
Pokemon Galactic Battles
Yes it will. Season 16 already began in Japan. In the Unites States season 16 will start tomorrow, 2 February 2013.
I think the name of Season 7 is Advanced Challenge.
Yes. It is called "Pocket Monsters: Best Wishes! Season 2".
Pokemon DP Sinnoh League Victors
The official name is Pokemon DP:galactic Battles. It is season 12 of the Pokemon anime.
Arcanine
Season 3, Episode 16.
The Orange Island League
No. Pokémon Best Wishes Series 2 has been announced in Japan, corresponding to the US season 16.
Games: Pokemon Red Pokemon Blue Pokemon Green Anime: Pokemon League Indigo Pokemon Indigo League Pokemon Indigo Plateau