Forum:Quick Goblin Zombie Question

I just had a quick question about goblin zombie, I know that you have to show your opponent the card you get from sangan's effect, but do you have to show your opponent the card you get from goblins zombies effect?

Thanks

Oh actually one more question, for the card kasha can I special summon it from anywhere as long as I have 2 zombies on the field? or does it have to be from my hand? because its not mentioned in the card text