Found the Giant Black Stallion (a.k.a Ganon's Horse) location in TOTK (no BOTW transfer) : r/tearsofthekingdom

Zelda: Tears of the Kingdom - Giant Black Stallion (Ganon's Horse) Location

Giant Black Stallion The Legend of Zelda TOTK - Hold To Reset

The_Rodd (u/The_Rodd) - Reddit

How to get Ganon's Giant Horse in Zelda Tears of the Kingdom

Zelda: Tears Of The Kingdom: Walkthrough - Collectibles, Tips, And Tricks

Ganon's Giant Horse Location Zelda: Tears of the Kingdom Tutorial

Zelda: Tears Of The Kingdom - Ride The Giant Horse Ishokin Shrine Guide - GameSpot

Zelda: Tears of the Kingdom - How to Get a Giant Horse (Ganon's Horse & Giant White Stallion)

The_Rodd (u/The_Rodd) - Reddit

Zelda: Tears of the Kingdom - How to Get a Giant Horse (Ganon's Horse & Giant White Stallion)

Retransfer botw horse : r/tearsofthekingdom