My favourite Johto pokemon are Espeon and Meganium. Espeon is one all of all time favourite pokemon. it's design is so simplistic, yet elegant and I love it, not to mention the fact that Psychic types absolutely enamor me. I also have a fondness for Grass types, especially grass type starters and Meganium is no exception. It's an unmistakably adorable pokemon, and come on, the fact that it has the ability to revive wilted vegetation is astounding, and only deepens my infatuation with it.
My least favourites, however, are Qwilfish, Octillery, and Unkown. I generally dislike the designs of Octillery and Qwilfish. Octillery looks laughable to me, and seems unpleasantly eerie. Qwilfish is just overall unsightly, it is questionably my all-time least favourite pokemon. Unkown on the other hand, is rather irritating, which is the only reason for my disdain towards it.