Rotom

[Altarofl]

I went to that TV around midnight, he still wouldn't show up. Did I not do something?

 

[Anyone 4 Buttons?]

Click A to see it and you should encounter Rotom, if not...then come back later on in the night.

That's what the Serebii page says, so I suggest going back at a later time.

 

[Chimecho3000]

Do you have the National Dex?

 

[*Jean Grey*]

Do you have the National Dex?

You don't need the National Dex, maybe you have to go on a specific day.

 

[Clash]

Actually you do need the National Dex, and capture Rotom anytime during the night.

 

[BugLoverCody]

You don't need the National Dex, maybe you have to go on a specific day.

The national dex is needed.

Try to go a bit later on and check again.