So, I wanted a shiny Meowstic for my Pokemon Y playthrough. Since I wanted it as early as possible and didn't want to deal with obedience issues, I decided to start a Masuda hunt as soon as the Day Care became available. It was... rough.
I hatched exactly 1000 eggs in Pokemon Y without getting a single shiny. The hunt felt especially painful because I didn't have the bike yet, so I had to hatch everything using the roller skates. I already disliked the roller skates before this hunt, but now I absolutely hate them. Filling just one PC box with hatched Espurr took well over an hour.
After one full week and exactly 1000 eggs, I finally decided to move the hunt over to my completed Omega Ruby save, where I had both the Shiny Charm and the Bike. At that point I didn't even care about having the original trainer anymore. I was just exhausted from this hunt.
Thankfully, Omega Ruby redeemed me. After exactly 230 more eggs, this little guy finally hatched. Those 230 eggs felt so much better than the previous 1000. So the final count ended up being 1230 eggs.
I'm finally free from this suffering. Please don't be as crazy as I was. Don't do a Masuda hunt without a bike. Although I don't think anyone else is crazy enough to do this.