My assumption is that the legacy chocobo is just barding. That way you can use it whether you had a chocobo or not.

I can't think of any fears I have that are hilariously bad. I'm afraid of heights and spiders. The fear of heights is because I'm kind of clumsy, so I just know I'll fall to my death off something really high and my fear of spiders is because I was bitten by one as a kid and had half my face swell up huge.