I will do lists of 5. I like them all for reasons ranging from cool designs (the major reason for most) mto usefullness. I gen: Snorlax, the sleeping bear whoe eats everything. Scyther, a mantis that dices enemies. Charzard, a giant fire-breathing dragon. Gengar, ghostly shadow creature Kabutops, bladed fossil fish. II gen: Crobat, flying ninja bat. Slowking, royal hermit crab thing. Kingdra, another king-like water type. Tyranitar, destructive green beast. Xatu, the mysterious past and future seeing bird. III gen: (This one is hard to narrow) Breloom, powerfull mushroom fighter. Flygon, mysterious sand dragon. Metagross, floating mechanical heavy-hitter Shedja, carcass revived to what we call life. Agrron, mountain dominant bi-pedial beast IV gen: Mamoswine, grounded ice pig of mammoth proportions. Lucario, aura seeing slightly overrated egyptian like fighter Luxray, electric cat with an evil aura and x-ray eyes. Leafeon and Glaceon, for being good eeveeloutions. (Yes, I know that's two, but they are equal in reasoning and amount of liking) Kricketune, the melodius red bug. V gen Serperior, regal and powerful grass snake. Braviary, noble, patriotic and majestic bird. Scolipede, viscious, speedy many legged millipede. Golurk, mysterious ancient guardian rocket. Ferrothorn, protective thorn in your side with one obvious weakness. Legendaries Articuno, beautiful ice bird. Celebi, time-travelling nature freak. Rayquaza, feared and respected dragon. Darkrai, misunderstood rare legend. Victini, victorious cute little thing. This list leaves out many of my other favorites, but it is a good start.