So far only two downloadable templates have been released, Kyogre and Groudon.
Japan: June 19th 2014 to June 25th 2014
July 3rd 2014 to July 9th 2014
July 17th 2014 to July 23rd 2014
Europe: July 4th to July 20th 2014
August 4th to August 17th 2014
This Groudon template is being released to coincide with the reveal of Pokémon Omega Ruby & Alpha Sapphire.
Japan: June 26th 2014 to July 2nd 2014
July 10th 2014 to July 16th 2014
July 24th 2014 to July 30th 2014
Europe: July 21st 2014 to August 3rd 2014
August 18th 2014 to August 31st 2014
This Kyogre template is being released to coincide with the reveal of Pokémon Omega Ruby & Alpha Sapphire.
As you can see, the events are already over, and so I assume you cannot get them anymore, unless they release them again. If you obtained Kyogre between August 18th and August 31st then it explains why you were able to download the Kyogre template but not the Groudon template, but if that's not the case I don't know.