Favorite Spot to Train?

[Crasher]

Mt. Silver is great because of the Pokemon centre, but I dislike fighting wild Pokemon (ditto Cerulean cave) so I go for the Elite 4.

[Natsuri]

Routes 40 and 41 for electrik types, route 44 for fire types and birds, Mt. Silver for pokemons over lv.40 and Elite 4 & Gym Leaders for my strongest pokemons.

[TheotherLati]

The Fighting Dojo in Saffron City and Mt. Silver are my favorite spots

[DizzyCobraMew]

Mt.silver, elite four, and battling Red because he is the toughest trainer (lv wise) in all the games gen4 and pre gen4

[Swagsire]

Elite Four all the time. Because everything is underlevelled Qwaa

[empoleon49]

The Dojo at Saffron is where I train.

[nathandg0924]

If EV training counts, then that route between Mahogany town and the Lake of Rage since the Pokes there give a lot of EVs for Sp. Atk and a lot of my teammates use Sp. Atk.

[Fearless123]

The one and only Dojo.

[DialgasMaster!]

I preffer to train at either The Pokemon Legue or in Kanto....... Sometimes I might trade over to my Diamond so they can be trained at Stark Mountain or something
My Soulsilver Team
I also have Groudon Kyroge Rayquazza Moltres Articuno Zaptos Entei Rioku Sicuine and Latios..... thats right...... i practicly finished the game......
My HeartGold Team

[AquaMilotic]

My training with Pokemon: first I EV train by beating wild Pokemon, then I'll level up in the Saffron Dojo (mostly) and the League (less frequently than the Dojo).

[Amish]

I like training outside Mt. Silver.

This. Also Victory Road before Elite Four

[xerxes]

the e4 and gym leader rematches. i always found mt. silver to be a horrible place to train.

[Auaria~]

I did a majority of my training in Mt. Silver and Gym Leader rematches. >.>

[MegaSerperior]

Like everyone else has said, I usually just go back to the Elite 4 or hold the Gym Leaders hostage.

[PopPrincess_Lyra]

I rather train in like Mt Silver so i have better chances getting a shiny Also my Meowths'll pickup items whilst training, nya~

[pug6666]

Mt silver.

[giratina519]

The entrance to mt. Silver. It has tough pokemon and a pokemon center nearby. It's perfect!

[devondashla]

For lower level pokemon (for whenever I start new teams), I typically give one pokemon an Exp. Share, and have my tougher pokemon go through the elite four. It may take awhile, but it's quick and worthwhile.

[Markness]

you can get trainer phone numbers and rematch them, some different days but if you beat them a couple of times they get more powerful and ting

http://serebii.net/heartgoldsoulsilver/rematch.shtml

[EliJolesy]

I usually train at Route 45 or Route 40/41 as of now....

[Street Comedy]

Before fighting Blue: Victory Road

After fighting Blue: Mt. Silver Cave

[pug6666]

I also use trainer rematches at times for low leveled pokemon.

[Nephilim]

As of right now, I use Mt Silver and Gym rematches. Gotta love exp share!

[ice33333]

Elite four of course

[*~Silver*~]

Right now, I'm training for the Elite Four as well. xD
My favorite spot for training is right under Ecruteak City in that little patch of grass behind those two twins. It has Stantlers, which tend to give you a lot of XP after battling, and the Pokemon center is only a few steps away, which really comes in handy for those of us who are too cheap [even with fake Pokemon money] to just buy some potions. xD