"Flashback [cost]" means "You may cast this card from your graveyard by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." You must still follow any timing restrictions and permissions, including those based on the card's type
Every time he gets to Banish a character in a challenge, youll gain 2 Lore, bringing you closer to winning the game
They can't be the targets of spells or abilities, their static abilities have no effect on the game, their triggered abilities can't trigger, they can't attack or block, and so on
The characters depicted as planeswalkers arent actually capable of walking across planes, just really powerful or important characters
Pokmon Trading Card Game Pocket certainly doesn't avoid all the pitfalls associated with modern mobile games