the legendary trio of unova are Cobalion, Terrakion, and Virizion
Not counting the pokemon from Unova, all of them but Raikou.
i believe you can get Kyogre at Undella Ruins
Yes it's even the last pokemon in the Unova pokedex.
in unova, about 7 legandary pokemon. in total, about 28.
Victini, Reshiram, Zekrom, Cobalion, Terrakion, Virizion, Landorus, Kyurem, Tornadus, and Thundurus.
Kanto: Dragonite Johto: Tyranitar Hoenn: Salamence Sinnoh: Garchomp Unova: Haxorus or Hydregion
Tornadus, Thunderus, Cobalion, Terrakion, Virizion, Reshiram, Zekrom, Victini, Kyurem, Keldeo, Meloetta, Genesec, and Landourus.
Usually something will happen but if not go to pokemon.com or buy a volume 2:the official unova pokedex and guide at borders or a bookstore.
No, he isn't. There are 13 Unova Legends: Zekrom, Reshiram, Victini, Kyurem, Meloetta, Genesect, Cobalion, Terrakion, Verizion, Keldeo, Tornadus, Landorua, and Thundorus.
it is unova dex #000.
dude unova is the region not a city
Nothing happens after that. You just caught the three legendary roaming Pokemon in the Johto Region.