>>18176677I have the Japanese Pokedex guide for XY. It has small interviews with each member of the production staff, where they are asked their favorite Pokemon and the most interesting feature of X/Y. Sugimori says his all-time favorite Pokemon is Venusaur.
And what he found most interesting about X/Y was getting to see the Pokemon in 3DI have no idea what Bulbapedo's source is here, but it's definitely wrong.