Um...I think it depends on the Ultra Beast. Some of them have the power to destroy cities, but Taka's not one of them...I think.

[erm.]

Ultra Balls...well, um, even though Ultra Beasts are Pokemon, they don't really click that well with normal Pokeballs? I guess it's because they're from a different universe or something, so um. Ultra Balls are special Pokeballs that only work well against Ultra Beasts, 'cause they're adapted for that.