>>58643902Shiny lock started with Gen 5 because that's. when "Shiny" became an official term, and TPC started leveraging shiny Pokemon for promotions and merchandise. It started right before BW with the Zoroark movie event. Shiny locks started when "Shiny" became a canonized proper noun and a marketing slogan. Interestingly, all languages except for English are standardized, they all translate to "alternate colour", and that term is distinct from how they translated the neo-era TCG "Shiny". English is the only language to break from the trend and hold onto this vestigial WotC translation.
