The following is a translation (courtesy of @クリスタル) of a news entry posted yesterday in Japanese:
I'm surprised that Sugimori is not only discussing the next generation, but also implies that some elements (excluding the Pokémon) may be removed or at least simplified. What exactly would that entail? Would it be a beneficial move? I sense that Generation VII will not follow Generation V's footsteps in capitalizing on new Pokémon, since he basically said that a high count of Pokémon is not necessarily preferred. For reference, here is an old quote from an interview about Black and White:In the magazine “We Love Pokémon”, Game Freak's Ken Sugimori commented on the seventh generation of Pokémon.
When asked what the next generation of Pokémon games will be like if such a plan exists, Sugimori commented that they will not add more layers of complexity, but rather revert back to simplicity, in part by using elements found in Pokémon Red and Green. Therefore, there is now speculation that Game Freak may opt for this route in developing Generation VII.
As a side note, not only the number of games, but also the number of Pokémon, moves, abilities, items, etc. increase as each new generation is introduced, to such a degree that is difficult to remember all of them. It is impossible to decrease the amount of Pokémon, and such a move is assumed to be uncalled for, but some fans have claimed that it might be better to significantly organize/trim the moves, abilities, items, etc.
Also, Sugimori thought that other than the content of the game, Pokémon designs could probably be simplified, as well. As an extra, he stated in the same magazine that his favorite Pokémon of all times, even now as of the Pokémon XY series, is still Gengar as in the past.
Note that by "going back to the basics" he was referring to revisiting familiar animals while using a different style. Generation VII will apparently try to recapture the simplicity of Generation I, so I would think that the concepts (as opposed to the style) would be different. I actually haven't seen Sugimori describe the approach used for XY (apart from the fact that he had difficulty designing Xerneas and Yveltal). I assume that the latest interview addresses that, but the news entry only mentions the part about the future.Mr Sugimori, how did you design the creatures for this game?
Ken Sugimori: As you know, Diamond and Pearl have already been released for the DS, making this is the second game for the DS (not including HeartGold/SoulSilver, Platinum or other spin offs). So if you create something similar it's going to look very similar.
So that was a challenge from the beginning. We wanted to make it very different from the previous game so we started thinking about how we could add something new and give a feeling of how new it is.
Mr Masuda gave us a mission - every Pokémon that appears in this game has to be brand new. No existing Pokémon. And so that meant it was a big challenge and we had to create a Pokémon world that is completely different.
In the Pokémon world there are Pokémon that look like dogs, horses and deer - as you can see, we always look at wild animals to get the inspiration. But those Pokémon - the dogs, deer or horses - already exist in previous games, so we took a fresh start, we went back to basics. We had to create something different. We took the designers to the zoo to look at animals to study the different animals.