Here is a breakdown of how I find to be the easiest way:
Have six pokemon in your party.
Save near the daycare, having one parent in the daycare and one in your party.
Turn off, set the DS clock, hit seed.
Check with coin flip app.
Put second pokemon in daycare
Pick up egg and check
SR for IVs
Highest 4th Gen OU CRE: 1582.46 (#22)
The latest version of PikaTimer is here
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Pikachu25's RNG Shack
My White FC: 2537 5798 1419