I wanna breed horse so whitch 2 pokemon do i use.
Which horse do you mean? Ponyta, Rapidash, Blitzle, Zebstrika, Keldeo, Mudbray, Mudsdale, Galarian Ponyta, Galarian Rapidash, Glastrier, Spectrier or did you just mean Horsea and are forgetting to put the 'a' at the end of it?
Rapidash is Ponytas evolution, so you need a male and female Ponyta for those two.
Zebstrika is Blitzles evolution, so you need a male and female Blitzles for those two.
Keldeo is a legendary, so it is not breedable.
Mudsdale is Mudbrays evolution, so you need a male and female Mudbrays for those two.
Galarian Rapidash is Galarian Ponytas evolution, so you need a male and female Galarian Ponytas for those two.
Glastrier and Spectrier are legendaries, so they're not breedable.
And if you actually meant Horsea, you need a male and female Horseas.