meloetta is a legendary pokemon from Pokemon Black and White version that you can only get by event or trade with someone who already has one
you find Meloetta in
No, Ash will not catch Meloetta.
Meloetta is not hiding in the Giant Chasm.
Meloetta is a Normal and Psychic type pokemon.
Yes, there are Pokmon games available online. One of the best would have to be tppcrpg.com, which is free and allows you to do the same functions as the handheld version of Pokmon--catching, training, and battling, that is.
You cannot naturally get Meloetta in Pokémon Black, you can only get Meloetta via an official Nintendo distribution event.
No, you cannot get Meloetta or Keldeo after beating the Champion.
Meloetta is not in the game yet but will be as a via wireless gift
Meloetta is not available in normal gameplay. To obtain Meloetta you must get it from an Event, like how you must get Victini from an Event also.
go to Castelia city, then go to the cafe in the smallest street, and show Meloetta to the musician, Meloetta will learn Relic Song then
ABXY
Sadly, no. The creators of the game forgot to add in the Pokedex, so trading is impossible without GameShark. :(