Hitting The Jackpot!

[EraMemory]

I haven't actually tested this yet, but I figure when you nickname it the sprite shows up. The only remaining question left is that will it show a shiny sprite. If it does, it'll cut that 10 minutes to probably 3-4?

Perhaps you misunderstood what I was saying. 

First of all, to confirm some doubts, yes; a Shiny Pokemon sprite will show if your pokemon is a Shiny during the nicknaming process. Confirmed from my own experiences with soft resetting and other shiny hunting endeavours.

Secondly, yes, that is the fastest way to confirm your Urayne is a shiny (and possibly your only chance since Hall of Fame forces saves afterwards). And yes, that is indeed my modus operandi thus far during efficientizing Urayne soft resets.

HOWEVER. 

The sequence of the events go like this.

1. Save before Urayne fight right in front of Curie.
2. Bla bla bla I BECOME DEATH
3. Beat Urayne
4. LONG, LONG, LONG, LOOOOOOOOOOOOOOOOOOOOONNNNNNNNNNNGASS CUTSCENE including:
dad: omg! u beat urayne
theo: Im so touched sniff snivle
Cameron: Why am I here
dad: NO! CURIE IS MY WIFE! IT CAN'T BE TRUE!! NOOOOOOOOOO
bla bla bla curie exposition
dad: did u know!?!? rage 
cameron: lolwut
dad: bla bla bla curie bla bla bla wife bla bla bla
*leaves*
theo: sorry mate
*actan appears*
theo: omg actan we have 2 fite again
cameron: w8 son
*urayne appears*
urayne : hi I is nt hungry now
*urayne flashback bla bla bla *
*flashback ends*
urayne: I want to b frenz
AND THEN! FINALLY! NICKNAME TIME!
5. Pray to god you didn't skip nickname/ mash a too fast and didn't glimpse urayne when it was shown.

As you can see.... 3/4 minutes is impossible. Because dialogue is unskippable. This IS the most efficient way.