My top 20 in no real order:
Zard
THEMANITAN
Krook
Garchomp
Infernape
Camerupt
Ampharos
Weavile
Scizor
Blastoise
Kyogre
Alakazam
Heracross
Rhyperior
Samurott
Excadrill
Chandelure
Gengar
Mewtwo
Staraptor
Eh there's probably a couple of snubs here that I forgot and a few I wish I could include like Zapdos, Gyarados, Arceus, Electivire, Gliscor and whoever else, but...yeah.
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XIII_rocks, the cream of XIII fanboyism.