To celebrate the
Sendai Tanabata Festival (仙台七夕まつり), a level 100
Jirachi will be distributed at the Tohoku Pokémon Center from July 18th, 2015 until August 16th, 2015. It knows the moves:
Wish,
Cosmic Power,
Play Rough and
Heart Stamp. It is also holding a Destiny Knot. Players of
X, Y,
Omega Ruby or Alpha Sapphire are eligible to receive this event Pokémon.
Source:
http://www.pokemon.co.jp/info/2015/07/150710_p01.html