In the May of 1998, another contest was held by the Manga magazine, this time titled "Mewtwo's Counterattack Comemmoration Illust Artist Contest." June 1998 saw another CoroCoro Comic competition, named "Pikachu's Summer Vacation Commemoration Illust Artist Contest." These competitions both asked readers to draw their own Pokemon card, and also come up with their own attacks
It was playing into hybrid's ability to make two-color pairs function like monocolor in terms of cost
Disturb also appears on transforming double-faced cards, but these don't transform on the battlefield
A nice way to set her apart from past incarnations
Well get there
Also, many artifacts with craft do something when they enter the battlefield, and they transform into something more useful later like a strong vehicle, equipment, or artifact creature