@Blade: He refers to the hotel in the southeast corner of Celadon City. You know, the one that won't allow Pokemon?
@ddude: Okay, here's my advice for a good team.
First off, I would honestly stick with Torterra. I suppose Roserade has its perks, but I honestly think Torterra is a better trade off, if you can work around its low Speed and 4x weakness to Ice.
For the Fire-type, stick to either Infernape or Magmortar, although I would personally suggest Infernape. Do NOT pick Rapidash, period. The other two are far superior.
However, between the two I suggested, Infernape would be better. His Attack and Speed are incredible, and he has quite a variety in his movepool. His defenses are admittedly crippled, but if you make him into the perfect physical sweeper, you should be just fine.
As for a Water-type, stick with Empoleon, Floatzel, or Gastrodon. All three are good, and have their ups and downs. Floatzel is great for physical sweeping, but his movepool is a bit lackluster, and a few well-aimed hits can take him down easily. Empoleon has fairly decent typing, and can have a pretty good movepool, but he can still be easily tripped up by a quick physical sweeper. Gastrodon is a pretty good choice, as well, and offers somewhere in between the two. He has a pretty average movepool, and can be pretty quick if executed correctly, but one or two well aimed Grass-type attacks will send it down in flames, and with the rising need for Grass-type attacks for Pokemon with Gastrodon's typing of the Water/Ground split, you'll always want to be wary of that. Other than that, there aren't any really respectable Water-types, so you should stick with one of those three.
Togekiss can be pretty good in battle, but you have to use him just right. The ParaFlinch strategy always works well with him.
You mean Giratina for a team? I suppose that's up to you, but I don't really see the fun in going through the game using an Uber to win battles. :-\
I suppose that's a general overview for a good team, not just for you, but for everyone. If there's any further advice needed, I'm always here to provide it.
And as a reminder for some of the newer members, if anyone needs help getting particularly persistent Pokemon, chances are that I can help you out. I've finished the Pokedex legitimately, along with everything else (aside from the ************' hax tower >__<), so I can help with just about anything needed. Just ring a bell, and I'll be around to help.

yeah, sorry. I guess I just figured that everyone has tried to get in that hotel at least once

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remember, if there are any pokemon rumors that you want me to check, PM me! (actually, I can only check non-cheating DPP rumors, I don't want to corrupt my file.)
Current test: in fire red and leaf green, if I use walk through Walls to leave the starting area without getting a pokemon and then get in a battle, will I be using MissingNo as my Pokemon? I'l post the results as soon as I can.