Pokémon episode title

An episode of Pokémon has the title "災厄のパルデア　──復活". Romanized it would be "Saiyaku no Paldea ──Fukkatsu", however IMDb does not accept the character "─" in the title. I tried replacing it with a "-" leaving the title "Saiyaku no Paldea --Fukkatsu" which seems closer to the original, with the link to the official website as evidence and it was accepted, however someone reverted the title to "Saiyaku no Paldea: Fukkatsu".

What would be the correct way to write this? Because although the original title didn't use ":", I recognize that it also doesn't use "-" and that this was a similar character used to replace the unsupported one.

Considering that, in addition to this title, the following episodes are also similar (災厄のパルデア　──驀進), what would be the correct way to romanize the "──" that are not supported by IMDb? Should we use "--" to simulate these characters or just ":" as the person used to replace them?

My submission from when I changed the title:
#261019-053706-902000