>1
It's not chaining, there is no chain, so get that idea out of your head.
>2
Talonflame / Volcarona should be the only thing in your party, should have Flame Body, and should know Fly.
>3
Make sure the foreign mon has the badge signifying such. I've seen nicknames in Japanese that were American, so just make sure.
>4
The fastest way to hatch as many eggs in as short a time as possible follows. Note that if you want to wonder trade shit for miles or stockpile high IV bartering chips, this is not the way to go.
>Daycare Man has egg
>Save
>Accept egg, and the next 4
>Use Hatch Power 3
>Hatch them all. Optional - check IVs
>If no shiny / good IVs, reset
>Decline the daycare man's first egg every time from now on (the one he has when you reload the game)
>5
Make sure you ARE using this technique well. MM is not the best way to get shinies - it's the best way to get good shinies. Egg moves. IVs. Natures. Starting off, if your parents aren't great, start trading them out for the children, and make sure to keep the correct items equipped. Obviously don't trade out your foreign parent, unless you somehow get a new, better one.
Anything else you're curious about, ask away.