Commands:

/summon mocreatures:wildhorse ~0 ~1 ~0 {TypeInt:[ID],Tamed:1}
/give player MoCreatures:amuletpegasusfull 1 [ID]



Updated ID's :

1 White
2 Creamy (Yellow / Dun)
3 Brown (Red / Bay)
4 Dark Brown (Brown with white socks)
5 Black
6 Bright Creamy (Light Yellow / Palomino)
7 Speckled (Grey with white patches)
8 Pale Brown
9 Grey (Grey with white spots / Dapple)
11 Pinto (Red and White)
12 Bright Pinto (Beige and White)
13 Pale Speckles (White with beige spots)
16 Spotted (White with small black spots)
17 Cow (Black and White)
21 Ghost Pegasus
22 Ghost
23 Undead
24 Undead Unicorn
25 Undead Pegasus
26 Skeleton
27 Skeleton Unicorn
28 Skeleton Pegasus
32 Bat
36 Unicorn
38 Nightmare
39 Pegasus (White)
40 Dark Pegasus
41 - 44 Bug Horse Non Flying
45 - 47 Bug Horse Flying
48 Yellow Fairy
49 Purple Fairy
50 White Fairy
51 Blue Fairy
52 Pink Fairy
53 Lime Green Fairy
54 Black Fairy
55 Red Fairy
56 Dark Blue Fairy
57 Cyan Fairy
58 Green Fairy
59 Orange Fairy
60 Zebra
51 Zorse
65 Donkey
66 Mule
67 Zonkey


Original Sources Credit:
https://www.planetminecraft.com/forums/minecraft/mods/mo-creatures-horse-command-554800/