It's not like there are many Pony games out, are there?
Horse_And_Pony_My_Stud_Farm_EUR_NDS-LGC
Pony_Friends_EUR_NDS-LGC
Pony_Friends_USA_NDS-SUPREMACY
Bratz_Ponyz_EUR_NDS-WiNE
Bratz_Ponyz_USA_NDS-XPA
Paard_en_Pony_Mijn_Paardenstal_EUR_NDS-UD
Clever_Kids_Pony_World_EUR_NDS-XPA
Pony_Luv_USA_NDS-SQUiRE
Pony_Luv_EUR_NDS-XPA
Bratz_Ponyz_2_USA_NDS-Goomba
Championship_Pony_USA_NDS-SirVG
My_Little_Pony_Pinkie_Pies_Party_USA_NDS-Goomba
Bratz_Ponyz_2_EUR_NDS-XPA
Watashi_no_Pony_JPN_NDS-iND
My_Pet_Pony_EUR_MULTi5_NDS-EXiMiUS
Pony_Friends_Minature_Breeds_v1.1_EUR_MULTi6_NDS-EXiMiUS
Pony_Friends_Mini_Breeds_Edition_USA_NDS-BAHAMUT
Discovery_Kids_Pony_Paradise_USA_NDS-BAHAMUT
Pony_Life_EUR_MULTi5_NDS-BAHAMUT
I thought that can't be the complete list, so I started to look through my cover-gallery. Here's a (nearly?) complete list of horse games out there till today:
QUOTE1080 - Pony Friends
1117 - Pony Friends
1125 - Bratz - Ponyz
1290 - Bratz - Ponyz
1482 - Pippa Funnell 2 - Farm Adventures
1484 - Horse Life
1540 - Paard & Pony - Mijn Paardenstal
1576 - Riding Star 3
1594 - Clever Kids - Pony World
1686 - Petz - Horsez 2
1715 - My Horse & Me
1908 - Best Friends - Mein Pferd
1915 - Horse Life
1931 - Real Adventures - Wild Horses
1974 - Deine Reitschule
1989 - Wendy - Ferien auf Rosenborg
1995 - My Horse & Me
2083 - Horsez
2103 - Let's Ride - Friends Forever
2238 - Horse & Foal - My Riding Stables
2361 - Anky's Ruiterschool
2475 - Pony Luv
2485 - Mary King's - Riding School
2653 - Pony Luv
2757 - Mein Westernpferd
2837 - Barbie horse adventures - Riding Camp
2867 - Tim Stockdale's Riding Star
2871 - Ener-G - Horse Riders
2879 - Bratz - Ponyz 2
2895 - Championship Pony
2926 - My Little Pony - Pinkie Pie's Party
2929 - Bratz - Ponyz 2
2932 - Bella Sara
2961 - Equestrian Training
2991 - My Horse & Me 2
3034 - Watashi no Pony
3042 - Pferd & Pony - Die Reitakademie
3071 - Barbie horse adventures - Riding Camp
3076 - Real Stories - Mission Équitation
3098 - Ellen Whitaker's Horse Life
3102 - Horseland
3130 - Equitation - Galops 1 à 7
3184 - Mein Freund das Pony
3197 - Pony Friends v1.1
3367 - Petz - Horseshoe Ranch
3472 - I love horses v1.1
3488 - Horse & Foal - My Riding Stables
3536 - Petz - My Horse Family
3617 - Apassionata
3623 - Horseland
3676 - My Horse Club - Auf der Spur des Appaloosas
3677 - Pferd & Pony - Mein Gestuet - Ein Leben fuer die Pferde
3803 - Ik en mijn paarden
3859 - Pferd & Pony - Mon école d'équitation
3987 - Pony Friends v1.1
4001 - My Horse & Me - Riding for Gold
4003 - I Love Horses
4063 - Discovery Kids - Pony Paradise
4143 - Wendy - Mein Pferdehospital
4157 - Pony Life