I have an article on the topic here: www.ludkinscollectables.com/blog/ethics-morals-and-trading-cards-the-normalization-of-pack-weighing The tl;dr of the article is that while pack weighing is almost always unethical, there are certain situations where the lines are blurred
Lets walk through a few interesting things about this deck
In addition to being able to flip multiple monsters, it doesn't target them, unlike "Book of Moon"
Were not likely to get another bout of inclusion in Standard to make this an $8 card again and if we do it will be accompanied by a reprinting, but this has upside and it shrugs off Dusk so already its worth looking at
After all, what other Pokmon game allows you to come face-to-face with the quintessentially Japanese, unstoppable force that is Imakuni?
That is, at least, so long as you dont factor in the creature type