Here is a short E-Mail interview I did with Hiroshi:
Q#1-Why is it you replaced the Porygon in the original with an Eevee?
A#1-I intend on finding other means of giving out Porygon. Besides that, it used to be Mewtwo and Coolboyman wanted to find something quick to switch it to.
Q#2-How did you come up with the idea of South Rijon?
A#2-South Rijon is also Coolboyman's original idea – how I executed it was up to me. The idea was to open it up to being a native area for 3rd and 2nd generation Pokémon.
Q#3-Is Lugia going to be catchable in the final release? Ho-Oh?
A#3-Lugia and Ho-Oh will make prominent appearances in the game, but they won't have a main game role like Ruby/Sapphire/Emerald/Diamond/Pearl, only because I haven't thought of one yet.
Q#4-Are you a fan of any current hacks?
A#4-Current hacks? It'd have to be Bronze right now, seeing as it's the only hack that interests me at the moment. I used to like GSC remakes, but then they became overcrowded with mediocre and discontinued ones.
Q#5-What do you see yourself doing after rijonAdvanced?
A#5-I don't see myself continuing much hacking for a while after rijonAdventures. Work, studies and everything else needs to take priority.
Q#6-Who is your favourite hacker?
A#6-Coolboyman's been my mentor for a while, and so I guess he'd be my favourite.
Q#7-Do you like any current animes?
A#7-Bleach, Pocket Monsters Diamond and Pearl.
Q#8-Were you disappointed at the cancellation of the great hack, Dark Oceans?
A#8-To be honest, I wasn't a fan of said hack.