Generation I introduced the three Legendary Birds, also known as the winged mirages: Articuno, Zapdos, and Moltres. Which one did you like the best? Please remember not to spam and explain your choice a bit. I'll go with Articuno. Although I like all three of them, it looks more appealing to me than the rest. It is elegant and majestic and I like its cry in the games. I also like the dungeon you encounter it in (Seafoam Island) much better than Power Plant and Victory Road.