Introduced in the 7th generation, the Ultra Beasts were a set of extra dimensional Pokemon that were important to the plot of Sun and Moon (and ironically are pushed to the side in Ultra Sun and Moon).
At the time of their introduction, these Pokemon were somewhat controversial. Why? They look weird. Really weird. Their designs do not match up with the designs of existing Pokemon, giving them a very otherworldly feel, which was the obvious intention, given they hail from other worlds. That aside, many people didn't care for them anyway, many of them defaulting to the digimon argument.
Personally, I fucking love them. They are delightfully weird, and I love their backstory. I really hope to see more in future generations.
At the time of their introduction, these Pokemon were somewhat controversial. Why? They look weird. Really weird. Their designs do not match up with the designs of existing Pokemon, giving them a very otherworldly feel, which was the obvious intention, given they hail from other worlds. That aside, many people didn't care for them anyway, many of them defaulting to the digimon argument.
Personally, I fucking love them. They are delightfully weird, and I love their backstory. I really hope to see more in future generations.