To have the egg appear as if you received it from a picnic, use this: .Egg_Location=30023
This will also work for egg formats as well, but be sure to include your trainer info, example:
.Egg_Location=30023
.Met_Location=values
a crystal cavern | 30024
a distant land | 30007
a picnic | 30023
Alfornada | 96
Alfornada Cavern | 67
Area Zero (1) | 110
Area Zero (2) | 112
Area Zero (3) | 114
Area Zero (4) | 116
Area Zero (5) | 124
Area Zero (6) | 126
Area Zero (7) | 128
Artazon | 86
Asado Desert | 24
Cabo Poco | 80
Caph Squad’s Base | 99
Cascarrafa | 76
Casseroya Lake (1) | 40
Casseroya Lake (2) | 108
Cortondo | 84
Dalizapa Passage | 69
East Paldean Sea | 60
East Province (Area One) (1) | 34
East Province (Area One) (2) | 104
East Province (Area Two) | 36
East Province (Area Three) | 32
Faraway place | 4
Glaseado Mountain (1) | 38
Glaseado Mountain (2) | 42
Glaseado Mountain (3) | 68
Great Crater of Paldea | 50
Inlet Grotto | 64
Levincia | 78
Los Platos | 82
Medali | 90
Mesagoza (1) | 8
Mesagoza (2) | 72
Mesagoza (3) | 74
Montenevera | 94
Mystery Zone | 2
Naranja Academy | 130
Navi Squad’s Base | 107
North Paldean Sea | 62
North Province (Area One) | 46
North Province (Area Three) (1) | 44
North Province (Area Three) (2) | 102
North Province (Area Two) | 48
North Province (Area Two) (2) | 98
Poco Path | 70
Pokémon League | 10
Porto Marinada | 88
Research Station No. 1 | 111
Research Station No. 2 | 113
Research Station No. 3 | 115
Research Station No. 4 | 117
Ruchbah Squad’s Base | 103
Schedar Squad’s Base | 105
Segin Squad’s Base | 101
Socarrat Trail | 109
South Paldean Sea | 56
South Province (Area Five) | 18
South Province (Area Four) | 14
South Province (Area One) | 6
South Province (Area Six) (1) | 16
South Province (Area Six) (2) | 66
South Province (Area Three) | 20
South Province (Area Two) | 12
Tagtree Thicket (1) | 30
Tagtree Thicket (2) | 106
Uva Academy | 131
West Paldean Sea | 58
West Province (Area One) (1) | 22
West Province (Area Three) | 28
West Province (Area Two) | 26
Zapapico | 92
Zero Gate (1) | 52
Zero Gate (2) | 54
Zero Lab (1) | 118
Zero Lab (2) | 120
Zero Lab (3) | 122
