Yes.
The best thing to do with trainer tokens would be to buy Boosters and Decks in pokemon trading card game online.
You can not buy Pokemon from the game corner in Pokemon diamond, but you can in heartgold and soulsilver
you can buy a pokewalker by buying the game Pokemon heartgold and soulsilver game pack.
Simple buy the game new in the collector package
no you cannot buy game corner coins in the newer versions of Pokemon gold and silver anymore.
Buy it from a store like gamestop or game crazy. Perhaps Target.
either online or game stop
The only way is to throw away your Heartgold version, buy the original Red version, and play a real Pokemon game.
You can collect trainer tokens from several online games from pokemon. You can then use these tokens to buy gear and other things for your pokemon trainer.
get a lot of coins in the game corner and then buy it from one of the guys next to the game
You need to order it in advance at video game stores.
You have to buy the game. If you don't have one then try to find one on eBay that is not registered.