You cannot buy dynamite in the pokemart's of Pokemon platinum .
go to veilstone and buy it in the larege pokemart
U can buy some at the big big pokemart in veilstone city on the 3rd floor
You can buy one for 1000$ at pastoria city. At the Pokemart, there's two people at the counter, buy from the one on the left.
all you have to do is is get an actionreplay and use LR up or B i dont remember hope this helps =^)
in a pokemart
You can buy them in the Pokemart in Pastoria City
u can buy it in a pokemart
Any pokemart
Any Pokemart anywhere
canalaves pokemart
in profile go to pokemart
You can buy it at the celadon pokemart mall.