Apparently Nintendo of America wanted to give Pikachu… and I quote… "huge breasts" during the localization of Pokemon.
Localization is a delicate process, some things that make sense in one region may not translate to another, not even on the actual act of translation either. A prominent example is Kirby looking pissed on the cover of every game for the American box art but being his usual cute Kirby self in Japan, or the Crash Bandicoot covers in Japan which were wildly different from the by comparison edgier US design. And turns out Pokemon had a redesign suggested that may have changed the way we see the games forever.
