I have a few quick questions about PKMN gold:

1. Where do you get the radio card?

2. Can you catch all three legendary dogs in one game?

3. Where can I get some money now that I've beaten the game?

4. Where is Bill's grandfather? And how do you get evolve stones from Bill?

5. How do I evolve my Eevee into an Umbreon?

Don't press the Submit button twice. (If you get the error message, hit Back twice.)

1. Answer the questionnaire in Goldenrod Radio Tower.
2. Yes.
3. Equip the Amulet Coin and beat the E4 and Red up a lot.
4. You get the stones from Bill's grandfather, not Bill, if you show him a certain Pokemon. The Pokemon he asks for (I forget the order) are Lickitung, Staryu, Oddish, Growlithe/Vulpix (or some fire type, forget exactly which) and Pichu (Yes, it is Pichu, despite that the question indicates Pikachu). Bill's grandfather is at the end of Route 25 (where you found Misty? He's in the house.)
5. Make it very happy at night (i.e. after 6pm, and before 4am).

- DNA

Know any tips on how to make it happy? I can never tell if it's happy or not...

http://psypokes.com/lab/happiness.php

Here. It took me all of 5 seconds to look on the main site.
Use the main site; it's there for a reason.

- DNA