To get one of these one the Nintendo Switch version, you will need to go to Genesis 2 and use commands to spawn the Gauntlet Mission variant (check Ark.wiki.gg Deinonychus page for the command) and use ForceTame on it. You will not be able to ride it even with a saddle, but you can use the command GetEgg while looking at it to acquire a fertilized normal deinonychus egg that you can hatch and use like a normal tame.