>>6442073 here, I actually found the interview on Bandai's Tamashii web and they actually say that the Wargreymon digivolving toy was designed at the same time as the actual character. The translation is almost google-tier but understandable nonetheless: http://tamashii.jp/t_kokkaku/92/?wovn=enSo after more than 15 years I finally have my concrete proof!