Hm, I'll make a complete list of all the shinies I've obtained in X version:
Non-Competitive:
-Wingull/Pelipper (1st, Horde Battle, Traded)
-Lampent (Friend Safari, Traded)
-Wartortle (Friend Safari)
-Swirlix (Random Encounter, Traded, found 15 minutes or so after hatching my shiny Eevee)
-Dunsparce (Friend Safari)
-Cacturne (Friend Safari)
-Sableye (Friend Safari, Traded)
-Delibird (Masuda Bred, unintentional side-effect of custom order)
-Noibat (Masuda Bred, unintentional side-effect of breeding for a competitive Noibat/Noivern)
-Poliwhirl (Friend Safari)
-Corphish (Masuda Bred, unintentional side-effect of breeding for a competitive Corphish/Crawdaunt)
-Gulpin (Horde Battle, found while EV training)
-Roggenrola (Horde Battle, found while EV training)
-Axew (Masuda Bred, unintentional side-effect of breeding for a competitive Axew/Haxorus)
Competitive (None of these will ever be traded):
-Eevee/Vaporeon ('Mira', Non-Masuda Method, random chance, 4IV)
-Ralts/Gardevoir ('Solstice', Masuda Bred, deliberate hunt, actually hatched two shiny Ralts within three hours of one another, Traded one to brother, 4IV)
-Caterpie/Butterfree ('Mothman', Masuda Bred, unintentional side-effect of custom order, 4IV)
-Charmander/Charizard (Masuda Bred, unintentional side-effect of custom order, 4IV & HA)
-Vulpix/Ninetales ('Ghostfire', Masuda Bred, deliberate hunt, 5IV & HA)
-Phantump ('Fangorn', Masuda Bred, unintentional side effect of breeding for a competitive Phantump/Trevenant, 6IV & HA)
-Ralts (3rd one, found while completing an order)
Received in a Trade:
-Seadra ('Rapture')
-Clawitzer ('Red Lobster')
-Politoed
-Basculin (Blue)
-Gengar
-Rayquaza
-Vulpix (subsequently traded to brother)
-Typhlosion
-Porygon2
Migrated from Previous Games
-Zubat ('Vlad', Ruby Nuzlocke survivor)
-Nidoqueen (Black or White)
-Hitmonlee (SoulSilver, still needs to migrate up)
-Haxorus (Black 2)
Event Pokémon
-Suicune, Entei, and Raikou (x3 each)
-Dialga, Palkia, and Giratina (x1 each)
Non-Competitive:
-Wingull/Pelipper (1st, Horde Battle, Traded)
-Lampent (Friend Safari, Traded)
-Wartortle (Friend Safari)
-Swirlix (Random Encounter, Traded, found 15 minutes or so after hatching my shiny Eevee)
-Dunsparce (Friend Safari)
-Cacturne (Friend Safari)
-Sableye (Friend Safari, Traded)
-Delibird (Masuda Bred, unintentional side-effect of custom order)
-Noibat (Masuda Bred, unintentional side-effect of breeding for a competitive Noibat/Noivern)
-Poliwhirl (Friend Safari)
-Corphish (Masuda Bred, unintentional side-effect of breeding for a competitive Corphish/Crawdaunt)
-Gulpin (Horde Battle, found while EV training)
-Roggenrola (Horde Battle, found while EV training)
-Axew (Masuda Bred, unintentional side-effect of breeding for a competitive Axew/Haxorus)
Competitive (None of these will ever be traded):
-Eevee/Vaporeon ('Mira', Non-Masuda Method, random chance, 4IV)
-Ralts/Gardevoir ('Solstice', Masuda Bred, deliberate hunt, actually hatched two shiny Ralts within three hours of one another, Traded one to brother, 4IV)
-Caterpie/Butterfree ('Mothman', Masuda Bred, unintentional side-effect of custom order, 4IV)
-Charmander/Charizard (Masuda Bred, unintentional side-effect of custom order, 4IV & HA)
-Vulpix/Ninetales ('Ghostfire', Masuda Bred, deliberate hunt, 5IV & HA)
-Phantump ('Fangorn', Masuda Bred, unintentional side effect of breeding for a competitive Phantump/Trevenant, 6IV & HA)
-Ralts (3rd one, found while completing an order)
Received in a Trade:
-Seadra ('Rapture')
-Clawitzer ('Red Lobster')
-Politoed
-Basculin (Blue)
-Gengar
-Rayquaza
-Vulpix (subsequently traded to brother)
-Typhlosion
-Porygon2
Migrated from Previous Games
-Zubat ('Vlad', Ruby Nuzlocke survivor)
-Nidoqueen (Black or White)
-Hitmonlee (SoulSilver, still needs to migrate up)
-Haxorus (Black 2)
Event Pokémon
-Suicune, Entei, and Raikou (x3 each)
-Dialga, Palkia, and Giratina (x1 each)