Near Sunny shore city, or go to Iron Island. To get there, you will need to talk to the sailor dude at Canalave city. Go inside the cave and find a blue dude.. who's name is Riley or something.
I finished the game and i personally would recommend mt. coronet.
I would recommend mt. coronet and rt 223 between Sunny shore and the victory road entrance. snxf
Mt Silver, but this is only unlocked by obtaining all 16 Gym badges, and talking to Prof Oak
You can also challenge gym leaders to a rematch if you want.
You can train them on Victory Road with the exp. share to help another Pokemon grow.That is really the only good training spot in the game b4 the Elite Four.
If you're going to fight the Elite Four, it's best to train at the Victory Road. If you're not at that point of the game, then you must have missed some trainers during your adventure.
Between routes 110-114(some parts of 103)
In the Pokemon league or in Victory road
Pokemon league or near it
Personally, I would train a Bird-Type Pokemon at a place where those types of Pokemon is very effective to it. Like Fighting-Types. They are weak to Bird-Types. So, I would train it there!
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use wing attack [get starly and train to level 9 and it gets wing attack]
you have to train the Pokemon for a long time and and use items on it and don't let it faint.
You can not find them you can only train them to 50.
route 205 for Pokemon diamond, pearl and platinum. the trainers have Pokemon from level 10 to level 17
Train it to level 45.
Train it to Level 30
You train your Pokemon to lvl 100 or you can find some at the battle frontier in the place where you rent Pokemon and select open level in Pokemon platinum
anywhere.
Some people will argue with me but i think the best place to train is at the Pokemon lugue you can battle them over and over again
There are various good places to train flying types in Pokemon Platinum. A good thing to do would be to use the vs seeker.
The best place to level up any Pokemon is the Pokemon league.By fighting the elite four at the Pokemon league your Pokemon will level up realy fast.If you have a low level Pokemon,give it an exp share and make a more powerfull Pokemon battle.
At the Pokemon league.
Personally, I would train a Bird-Type Pokemon at a place where those types of Pokemon is very effective to it. Like Fighting-Types. They are weak to Bird-Types. So, I would train it there!
find a place that has wild Pokemon the same level as it.
in heart gold cerulean cave in platinum i don't know