A mysterious force send Gohan and Videl to Equestria, where they start their new life working at Applejack's. Everything is completely normal until the Cutie Mark Crussaders found about Gohan's power, so they force the young saiyan to train them to obtain a super cool Cutie Mark in martial arts and participate in the most famous torunament of martial arts of all Equestria; the Budokai Tenkaichi

This is a translated version you guys, my original is posted in Spanish, my mother language. If you speak Spanish you can find the original here. It even have an epilogue about a battle between Tirek and Gohan (unfortunately untranslatable)