[Not a bug] Ignore this, I was wrong.

[Shuyin178 0]

Spoiler

I don't know if this is an error or not, but for some reason when I go to use a Fire type attack vs Adrienn's Pokemon they are immune to it.
One of my friends also ran into this issue. This isn't restricted to a single Pokemon either, I tried to use Flare Blitz with my Infernape on Mawile and she used a fire attack (don't know which one) on Granbull but both of them were immune with the type immunity quote popping up. 
Is there an in-game reason for this we're unaware of or is this a glitch? Thank you ahead of time. 
(I finished EP 16 regardless of this though, keep up the great work because the story and battles were amazing as always.)

 

[Dragon116 13]

Spoiler

That's because fire type attacks become Dragon type attacks in the Fairy Tale field.