Why does Fire Spin's secondary effect not happen?

Question

I was looking for an Eevee in Route 10 Kalos and I encountered a Sigilyph, so I used my Braixen's Fire Spin to give some passive damaging before trying to take it out with Flame Charge.

But...the fiery vortex effect did not happen! The Sigilyph only took the active damage from the turn I used Fire Spin and the passive damage from the vortex effect never happened. This also happened one time when I was fighting a trainer's Slugma but since it was a fire-type, I assumed the vortex does not affect it - However Sigilyph, which clearly isn't a fire-type also didn't take this effect, so I wonder what happened.

Comments

Definitely not immune due to it being fire-type. I don't really have an idea as to why it didn't take that trapping damage, we would need more info of the situation (a video of the Slugma would be helpful, but I don't think they have it).

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Can you show us a screenshot or video of a Slugma getting hit by fire spin and not taking the passive damage?

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The battle was from a while ago and since it was a regular random trainer battle, I unfortunately did not take any videos or images

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It's more likely this is just misremembering than some obscure interaction with Fire Spin that nobody has written down before.

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I scanned through just about every Kalos location that has Trainers, and none of them had a Slugma. If I didn't miss anything, I think it's safe to say this didn't actually happen.

Answer 1

Sigilyph had Magic Guard, which prevents indirect damage. This includes the damage received while bound by a move like Fire Spin.

As for Slugma... I'm confident saying this didn't actually happen. There are no Trainers with Slugma in XY, so I think you just misremembered.

Answer 2

Well, probably the Sigilyph had the Magic Guard ability, wich gives immunity to any
passive damage, like poison, hazards, recoil and the damage from Fire Spin.

Comments

A previous answer said this also. However, do you have an explanation of what happened with Slugma?