In case fans don't know he keeps working on the pokemon games but his roles is only on the battle mechanics.

Morimoto has been working on Pokemon since Red and Blue he is was also the creator of Mew. That's right this guy is the one that coded Mew into the game, he created mew two weeks before the game finished developing it in secret, not even the team knew of this.

He also Directed both Pokemon Emerald and Heart Gold and Soul Silver, you know two out of three games that include the battle frontier. At the same time Heart Gold and Soul silver being consider one of the best Pokemon games with how much content the post game has, from the battle frontier, walking pokemon, the kanto region and even the Pokeathlon. Not to mention the new extra areas to capture legendary Pokemons and the Sinjoh Ruins which was the first time Players could obtain Arceus.

You could say alot of heart and soul went into making those games.