absolute favourite: Lugia. other favorites would be: Charmander-Charmeleon-Charizard, Ninetales, Abra-Kadabra-Alakazam, Gastly, Haunter, Gengar, Hypno, Gyarados, Vaporeon, Jolteon, Flareon, Aerodactyl, Articuno, Moltres, Zapdos, Mewtwo, Mew, Typhlosion, Totodile, Xatu, Ampharos, Espeon, Umbreon, Murkrow, Houndoom, Suicune, Mightyena, Sharpedo, Seviper, Salamence, Latios, Rayquaza, Glaceon, Leafeon, Luxray, Liepard, Zebstrika, Archeops.
gotta say the first two generations were the best and the rest are shit really. that's pokemon wise of course, didn't spend too much time on the games to know that as well. if they continue though I hope they find a way to recapture the magic, pokemon has tons of potential