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!
e1337 4
you have to train the Pokemon for a long time and and use items on it and don't let it faint.
the best place to train at is in enterna forest because when you with Cheryl run in the wild and battle Pokemon i got my ponyta up 6 levels in half an hour from lvl 20 to lvl 26 and you don't have to heal. Other places are route 202 route 217 and between velistone and the resort place just use the vs seeker and keep battling them like the collectors and breeders and others Hoped i helped :)
weenboob
They're very difficult to beat, you need to train your Pokémon a lot if you want to have a chance against them.
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.
in heart gold cerulean cave in platinum i don't know
you should train sycher against fire and pshcik pokemon:D
route 205 for Pokemon diamond, pearl and platinum. the trainers have Pokemon from level 10 to level 17
Train Aron.
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
if you have a lv 50 you can train at the Pokemon league my togekiss was lv 50 and now hes a lv 70 in just a couple of minuts
Eterna Forest is a good place to train, but if you get sick of that and you want even stronger; Old Chateu is great. With all the creepy GHOST Pokemon plus the legendary ROTOM in the TV.
Train it to level 45.
Train it to Level 30