Question: We know that the chameleon Eddie Van Blundht can manipulate his unique extra layer of muscles to mimic male faces and physiques, thus hijacking their identities. However, Eddie can't mimic clothing, so he must hastily seek new clothing to go with each new identity. But when Eddie is on the run from Mulder and Scully, he abruptly mimics Fox Mulder and is seen wearing exactly the same tailored suit and tie that Fox Mulder is wearing on the same day. In fact, they even cross paths in the hospital while they are wearing identical tailored suits and ties. Question: where and when could Eddie possibly acquire an exact tailored suit and tie to match Fox Mulder's on such short notice?
Answer: When Eddie enters the home of one of the couples whose baby he fathered and hides in the bathroom, he emerges looking like Mulder, fooling them. Later, they call Mulder asking if they can use their bathroom again and why Mulder needed to take the man's charcoal suit, which tells us that Eddie took the suit on the pretext of needing it for the investigation, but obviously wanted it to wear to better impersonate Mulder.
Chosen answer: It might be a plot hole, but a possible explanation is that Eddie had previously met Mulder and seemed keen on getting him out of the picture so he could get closer to Scully. He may have carefully studied Mulder's clothing and obtained a suit of his own off-screen.
Phaneron ★