I'm using Pokemon White 2. I haven't set it to "Day Care CoupleG4" it's the regular Day Care Couple location setting. Also, I've let it hatch to see if it will correct the problem; it has not.
It is also a pokemon I normally can get from an egg((Umbreon), and I've also tried doing it with different pokemon to see if that changes anything; it doesn't. Well, I know you can't get Umbreon from an egg, but you can get Eevee, but yeah, I tried it on pokemon that I can definitely get from an egg.
Here are the codes for the Umbreon though:
94000130 FDFF0000
B2000024 00000000
E0019728 00000088
B9785484 5D2B0000
AC0C1608 43705807
84C4B997 EE2F3CE3
67B482AF 03E04A0B
F880B4C4 278A08E7
E051DC87 C4D02BD7
66D3E099 139D1F27
28AAFBE8 FCDFC9E8
164A2839 3B597877
31EFC074 6DD54DD5
C1B0566E D1E94484
97A4F5EC FAD6A68E
D9AAD338 70DB1FA5
1DD5B681 DC38CDF4
97A67D01 72D0F2B5
4EB1C2F4 DDA33F2F
E4468DB9 B2BB63B3
E00197B0 00000054
E2388414 E7BE1708
9AFAEABA D3F7BDD1
DA02B92D D0F25809
D56D03DA 45EFB0F2
CA3D1D09 1FBA2287
0C52B929 302203CD
4E4D046D 1F9B8A8A
65DC7D9C D51E143C
103CAA27 784E0A4C
7AFEF77D 71DBD583
950E5D9E 00000000
D2000000 00000000