What movies are DFX?

Excuse me, but could you possibly clarify your question? It seems you're asking about something related to movies being referred to as "DFX," but as far as I'm aware, "DFX" isn't a commonly used term to describe movies. Could you be referring to a specific film series, a production company, or perhaps a particular film effect that utilizes some form of digital enhancement or technology? If you could provide a bit more context or detail, I'd be happy to try and give you a more accurate answer.