"Hoenn confirmed" is a popular internet joke in which a person creates evidence, often plentiful and very questionable, leading to the conclusion that popular video games Pokemon Ruby Version and Pokemon Sapphire Version are confirmed to be remade.
Use on the Smash Bros. Board
Several users have used this joke on the board. More recently, people have been using Charizard and Greninja both being playable characters, as well as final evolutions of starter Pokemon and 2/3 of the Fire/Water/Gr trio to lead to the conclusion that Sceptile, a starter Pokemon that would complete the Fire/Water/Gr trio, will be a playable character in Smash Bros. Obviously, since Sceptile is a starter Pokemon in the Hoenn region, this would mean that Hoenn is, in fact, confirmed.
Hoenn was actually confirmed on May 7, 2014.