>>46590577found it, yeah I was right
>This shiny Metagross was distributed at the 2013 Pokémon National Championships in Birmingham, UK.>It was also distributed at other European National Championship events.>An identical Mystery Gift was later distributed at the US National Championships in Indianapolis, Indiana.>It was modeled after the Metagross used by 2013 VGC Master Divison World Champion Ray Rizzo. 
