How To Get Arceus In Heart Gold Is It Too Late To Get The 12th Movie Arceus?

Is it too late to get the 12th movie Arceus? - how to get arceus in heart gold

Recently, I got my Nintendo DS Wi-Fi connection I Chlorine Pichu pikachu GameStop, but I want to know if it's too late to get the film Arceus 12th I've heard that Arceus is sick and has good movement and it is necessary heart of gold and silver for the soul of HG / SS Arceus event.
Thus, it is too late to get to Arceus?
How else can I retrieve it?
can be transferred to me?

Please answer because I want this Arceus.

Thanks