Yamamoto's Nyorotono and Kingdra Event Distribution
For winning the 6th Smash Tournament, Yamamoto's Nyorotono and Kingdra were distributed at the Pokémon Centers in Japan from September 29th, 2013 until October 6th, 2013. Yamamoto was also given a trophy for winning.
Official Site News Article
The official Japanese Pokémon website also posted a news article to announce the distribution. It included the same details as listed on this event page.