'Ah, this trainer is still strong' and 'If I do this here, this is going to happen'. I knew I needed to respect these feelings." However, Morimoto also felt he needed to make sure that the games would feel as new games to those who began playing Pokémon in recent years on the Game Boy Advance or the Nintendo DS. An in-game author surrogate of Game Freak's President in Celadon City states that the team strove to make a game that would appeal to players with fond memories without "redoing the same thing". He also states that making the game was a "rewarding challenge". On the differences between the remakes and the originals and how the names bore out of that, Morimoto said "With HeartGold and SoulSilver, the way in which trainers and Pokémon relate has become a major theme and this has been added to the story. We came up with the titles HeartGold and SoulSilver as we decided these were appropriate to express this theme." HeartGold and SoulSilver introduced many new features that were absent in the original Gold and Silver, several of which came from the previously released Nintendo DS Pokémon games, Diamond, Pearl, and Platinum. Release and promotion Rumors that Nintendo planned to remake Pokémon Gold and Silver started circulating in early May 2009 after the Japanese television show Pokémon Sunday ended by announcing a "world-exclusive first announcement" that would be made on its next show. Kris Pigna of 1UP.com speculated that this alluded to a possible remake of Gold and Silver for the Nintendo DS, due to gold and silver disco balls hanging in the background. Pigna further reasoned that this would be consistent with the previously released titles Pokémon FireRed and LeafGreen which were enhanced remakes of the original Pokémon Red and Blue. Several days later, Nintendo officially confirmed that Gold and Silver were being remade as HeartGold and SoulSilver and released their official logos. It was also announced that the games would contain numerous updates, although they declined to reveal any specifics. The games were released for the Nintendo DS on September 12, 2009 in Japan to coincide with the tenth anniversary of the original Gold and Silver release. Junichi Masuda stated on his blog that "we, Game Freak have spent long and firm time developing above two titles", and that "'Pokémon Gold & Silver' will be back with far more excitement." At