Any Ice type Pokemon with a Ice type move because Ice moves are super effective against Dragon and Flying types and Altaria is a Dragon Flying so that Ice move will multiply its power by 4! Here are some ice type Pokemon: Glalie and Walrien.
no
Good against steel Pokemon are fire and water Pokemon.
fighting is good against normal Pokemon
Flying type Pokemon are good against normal Pokemon.
Totally, Altair's specialty is being sneaky and nobody noticing him, as Ezio is good for large brawls against multiple guards. If Altair and Ezio were put in an arena to fight eachother, Altair could not hide and would not have the element of surprise. With Ezio's superior brawling skills, he would win.
Ghost pokemon are good against psychc and ghost.
Electric Pokemon, and Grass Pokemon are good against water
Fighting Pokemon
Earth and water Pokemon are good against electric Pokemon.
Fighting Pokemon are good against Ice, Normal, Rock, Dark, and Steel Pokemon.
This question is rather unthoughtful, as it does not mention a specific Pokemon for others to be "good" against. A rle of thumb, though, is that types which is super effective against other types are "good" against those.
Ice and Rock Pokemon