My favourite Pokemon used to be Lotad, then I thought it didn't look that cool, so I changed it to Ledian, then I realised I hardly ever used it, so I changed it to Whiscash, but then I didn't use that often, then I changed it to something I can't remember, so I had to choose one of the two Pokemon I battle with: Rayquaza or Kyogre. I decided Kyogre.
I have caught 3 shinies:
Lampent - Ghost Friend Safari - Ramdomly
Sableye - Sky Pillar - Ramdomly
Spinda - X & Y Route 21 horde - Randomly while EV training
Also brought a pre-owned SoulSilver with a ton of shinies. :D
I also have a shiny Jirachi in AS, Mew and 3 Mewtwo Pokemon + TWO Gyaradosites in Y.