My favorite grass type Pokemon... I think you just killed me with that question. Grass is my favorite type next to electric so I'm going to have a very hard time picking. I'll say Whimsicott since it's so fluffy and adorable, but the Chikorita line is also a favorite of mine! What about you? Welcome to the forum. :)
Your dad's involved in a forum? That's really cool and I've yet to see anyone mention a parent being part of a forum. Is he a staff member there or just a regular? I can't imagine getting my parents involved in a forum haha.. they'd probably break every rule known to man since they just wouldn't understand how it works. xD; But going past that, if you're interested, we'd love to know a wee bit more about you so it's easier to see what we all have in common! Creating an introduction is a good first step but there's always a way to make that even better. For starters, you can share with us when you got into Pokemon and what your favorite game is! Additionally, are you interested in any other parts of the franchise? Most of us are into the games of course, but there's a lot more to Pokemon than just that.
If you're a fan of grass types, we do have a wonderful
grass type fanclub that you can join. It's about to die though, since it hasn't had a post for almost 30 days, so you'd better hurry and join if you're interested. The members are going to love having you there and it's also a good way to meet people who are similar to you, so on that note I'd also recommend looking through Pokemon Clubs and Forum Clubs & Groups (non-Pokemon clubs) boards sometime to see what's available to join. :D If you don't find a club you like, chances are you can create one of your own if it hasn't been reserved by another member.
You can also check out our myriads of other Pokemon boards, like the Metal/Color Generation Gaming board if you're a fan of the earlier games, and have an awesome time browsing! Chances are you'll find pretty much everything here. PC is one of the biggest and best Pokemon forums out there, hehe.
See you around!