I've recently leveled up my legendary bird trio to level 100, tch, and I must say, Zapdos is best, just like Raikou is the best dog. Not as good with HP as Articuno and Moltres, same goes for defenses, but Speed and Sp.Atk. make it an excellent sweeper.
Personally, I's like Articuno the best. :/ I know that Zapdos is the most useful out of the three, but Articuno is just one of my favorite Pokemon in general. It helped me beat a lot of Pokemon Stadium. >_>
And I also have a lv. 100 Articuno in my Emerald game.
Articuno. Its a great ice-type pokemon.
Beautiful and grand. Articuno is da bomb!
I don't use it because usually I don't use legendaries
but Articuno is really special for me.
Moltrass all the way I know someone who caught Zapdoes and Articuno in like 5 minutes but toook him 3 weeks to catch Moltrass (not strait) I can't catch it either