Because Relic Song is a Normal attack, can Meloetta change form against Ghost types? Just wondering.
>One problem with this set is that Ghost types can switch in on Relic Song and "block" your transformation.
So, no. From a reliable source, it will not change if you are versing a Ghost Pokemon.
Hope I helped. :)
No because as you said it is a Normal type attack. You would only be able to change it if it was a different opponent or some move like Foresight was used.