Fuck it, going each Gen for moi.
Gen1: Mewtwo
When I first played Blue and I found the Cerulean Cave. That fight took fuckin AAAAGES for me to catch Mewtwo since I used my masterball on an Articuno. But man, after that, I felt like a fuckin god amongst my peers since they never knew who Mewtwo was. my bragging rights were through the fuckin roof. Never forget you, Frieza. Never forget ;_;.
Honourable Mentions: Nidoking, Rhydon, Dragonair, Alakazam, Scyther, Electabuzz.
Gen2: Feraligator/Houndoom
Couldn't choose which one I liked the most, so fuck it, both are my Gen2 favourites.
Feraligator: Because he's a badass crocodile kaiju with a fuckin mean streak as big as Snorlax's fat face. I love him, my favourite Water Starter hands FUCKIN DOWN.
Houndoom: That name is fuckin great, I don't care. He's possibly my favourite dog inspired Pokemon by far. He may seem edgy as fuck, but, I just love it.
Honourable Mentions: Sneasel, Scizor, Raikou, Lugia, Ursaring, Typhlosion, Tyrannitar.
Gen3: Deoxys
Attack Form more precisely. I love me an Alien Pokemon that has multiple forms and has a cool as fuckin colour design. I also like how he's very alien-like compared to other pokes.
Honourable Mentions: Sceptile, Aggron, Rayquaza, Wailord, Milotic, Regirock, Regice, Registeel, Latios.
Gen4: Infernape/Garchomp.
Sun Wukong inspired pokemon with a baller as fuck design? YES FUCKIN PLEASE!
Garchomp, one of the toughest Dragon Types around and a motherfucker that doesn't play about. You're playing with Fire if you go against this fucker in the hands of a competent trainer.
Honourable Mentions: Darkrai, Empoleon, Torterra, Weavile, Electivire,
GenV: Hydreigon
Do I like Psuedo-Legendaries? YEP. Psuedo-Legendary inspired by a Hydra? FUCKIN YES! Possibly the biggest contender for all time fave, I love Hydreigon, it's just really fuckin great.
Honourable Mentions: Emboar, Samurott, Thundurus, Genesect, Archeops, Volcarona, Golurk, Bisharp, Accelgor, Haxorus, Eelektross, Scollipede.
GenVI: Hawlucha/Malamar
Hawlucha: Because a bird pokemon designed like a Lucha is rad as all hell. I just love it, is always my speedy attacker on my teams.
Malamar: I love Lovecraftian looking monsters. This guy won me over immediately when I saw it.
Honourable Mentions: Greninja, Noivern, Aegislash, Pangoro, Tyrantrum, Zygarde, Pyroar, Dragalge, Barbaracle, Hoopa, Volcanion