According to a recent post on Serebii, the Round Charm, an item that increases the chance of finding an egg at the daycare, and the Shining Charm, an item that increases your chance of finding Shiny Pokemon are both apparently available without any sort of event.
To obtain the Round Charm, you must collect all 301 Pokemon in the Unova Pokedex. To obtain the Shining Charm, You "gotta catch 'em all," completing the national 'dex. Additionally, seeing all Pokemon in the Unova 'dex allows you to travel to a special garden where non-Unova Pokemon can be found.
There is currently no word as to whether event Pokemon like Victini or Mew are required for this, or if an exception is made for them in this case, as it is when it comes to obtaining the "Pokedex Complete" Trainer Card upgrade.
For those of you who, when playing past games, were frustrated about getting a "I collected 493 Pokemon and all I got was this stupid certificate!" certificate, it looks like your hard work may finally pay off.