Plenty of videos of the immersives on Youtube; I referred to this playlist.

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Disclaimer:

This tier list is my own subjective take. In terms of personal preferences / bias, I tend to value camera work and soundtrack more than other aspects.

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Thoughts:

In general

Nothing belongs in S-tier IMO. The S-tier should be reserved for something that stood out, something that truly exceeds expectations. Prime examples from A-series would be Mewtwo and Palkia IMO. I don't find any B-series immersive to be on the same level.

On a more meta level, it feels like the B-series immersives just don't hit the same high as the A-series ones.

Card-specific

Mega Lucario is the worst immersive for me. All it did was have the camera pan around and zoom out from Mega Lucario, then bring in a cut-out of Mega Charizard. So lame, so underwhelming. As a bonus, the still image is a way too zoomed-in close-up of Mega Lucario's face.

Mega Charizard Y is the runner-up for worst immersive. Just like with Mega Lucario, all the camera did was pan around, giving us close-ups of the Charmander evolution line. At least the still image looks cool.

Based on my preferences, you'd think I would rank Mega Gardevoir significantly lower. All it does is zoom out a few times! But something about the zoom-out-and-pause timing fits, plus the soundtrack slaps. I ended up enjoying this one more than I thought I would.

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But these are just my opinion.

What are your thoughts on the B-series immersives? How would you rank them? Do you have a clear favourite (or clear dislike)?