I just stumbled across this thread, and I've always loved gen II, so I'll join!
Name: Imperator161
Partners: Hmm, that's hard. I like so many Johto Pokemon. I'll go with the two most memorable ones from my (unbalanced) Gold team, Totodile and Quagsire
And the questions from the first page of this thread:
1. What was the first Johto game you played?
Gold
2. What is your favorite Johto Pokemon and why?
Again, a hard one. I'll have to go with Totodile, my original Johto starter. I didn't like the way it's evolved forms looked when I originally played through, so I kept it unevolved all the way to level 100. I also like the rest of its line now, the Cyndaquil line, Pichu, Quagsire, Hoothoot/Noctowl, Ampharos, the Teddiursa line, Tyranitar, and a bunch of others, to name a few.
3. When did you first start loving Johto?
When I first started playing it in the fall of 2000, I suppose. I started with Red, and many of my all-time favorite Pokemon (especially Blastoise and Pikachu) come from gen I, but Gold is when I really grew as a Pokemon trainer. I fell in love with it from my first evening wandering with my Totodile to Mr. Pokemon's house and capturing the Hoothoot that became the second member of my team, and I was awed to wake up the next morning and discover that the clock had advanced on its own and that it was now daytime.
4. If you could own one Johto Pokemon and one only, which one would you pick and why?
Probably Totodile again, for the reasons mentioned above. But I wouldn't want just any Totodile. I would want the one from my first fateful journey through Johto some 14+ years ago.
Teddiursa sounds pretty huggable and cuddly, too. Although I wouldn't want to have to deal with its angry Ursaring parent.
5. Do you have any favorite fanart images of Johto Pokemon you like? Share them with us!
Not really, sorry.
6. Which Johto Pokemon mega evolution is your favorite and why?
Probably Ampharos. I've always liked Ampharos, and its mega is just so...fabulous. [Groan.] But really, Mega Ampharos is pretty awesome, and I like the hair and the dragon typing, even with the addition of fairies.
7. Who do you prefer, Phanpy or Teddiursa?
Teddiursa. Bears are my favorite animals, and Teddiursa is an adorable bear. I like Phanpy too, but Teddiursa was also my first breeding "project" (with egg moves and careful planning), so I like it for that reason too.
8. Have you played generation two remakes--HeartGold and SoulSilver?
Yes, I have. I like them, and it was great to traverse Johto again, but my journey wasn't quite as magical as it was with Gold. Certainly, I enjoyed them, but I didn't put as many hours into them, and I don't have the same sorts of memories that I had with Gold. But I was a strong proponent of a Gold remake for years (that's actually how I ended up here--I heard about ShinyGold and came here in hopes of reliving my Gold days, and made an account so I could download the patch), and I'm really glad that GF finally remade my favorite generation.
And, as for the new question about the Pokedex: Yes, I completed my Pokedex on Gold. It was the first Pokedex I ever completed, and it was quite challenging to do so. The most time-consuming part was probably borrowing a friend's spare copy of Yellow and playing all the way through it just to get an Omanyte, since neither of us owned one. I also recall starting a copy of Blue repeatedly and trading over the Kanto starters to Gold. The last Pokemon I caught was Unown (when I completed the entire Unowndex), as I was afraid of them when I started because they seemed mysterious and I was afraid they would glitch up my game like Missingno. (Not sure why I thought that, but kids' minds work in strange ways.)