Of course they CAN kill you. Probably all of the pokemon except goldeen CAN kill you, in certain circumstances of course. What I was saying is that if you know anything about the game, and you have seen the pokemon's attacks before, you CAN avoid them. By 'big flaming bird' I am going to assume you mean moltres. The attack takes up the whole screen vertically, but there is alot of space to roam horizontally, plus there is a TON of lag before it uses the move that screams "hey dude! get out of the way" I dont recall porygon 2's move but I am sure that it is fairly easily dodged aswell.