These precons are meant for beginners but are quite competitive, as most cards in them are perfect for tournaments
There are obviously exceptions to the rule, they don't necessarily have to lose (Kaibaman), but in general, the way I would categorize these characters would be having only one full on-screen duel
While at the time of writing, there doesn't seem to be an English version of this release date, the date was confirmed via Pokmon's Chinese website
(2016-07-13) If the enchanted permanent is a land and has land types, it retains those types even though it loses any intrinsic mana abilities associated with them
She very strong, and players often won't kill her since they can draw cards without any investment
Interestingly, the Charizard Plasma Storm card was printed wrong, displaying a Fighting energy requirement on its attack, rather than Fire