well in my real life mario serie the cobra snakes you see in smb2 are still snakes lol they are one of the mutated specie so they got bigger and a strong venom.they may look cute with there colors but dont be fool by the white skin around its eyes who makes it look like big cute eyes they are big enouph to be one of the most sneaky nature enemie. but there mostly armless if you leave them but be warn by the king of the mutated cobra the tree headed one(we know who that is) there heads can be collected to buy grenades update. you can have venom grenades its a good weapon to have ^^ and if you are affected by there venom. you can take a blue mushroom...with the two kinds of poisons it creates a cure ^^