To be able to find this movement, you will have to go to the Veilstone City department store, which consists of five levels. The city is east of the map, north of Pastoria City and east of Solaceon Town and is full of rocks.
When you arrive in the city, you will see the warehouses to the northwest of the Pokémon Center. It is a tall yellow and green building, which you will have to access and go to the elevator in the upper right part, in order to get to the third floor, where you will find an ATM in the lower left part of the room, from whom you can buy this movement for $5,500.
That's everything you need to know about how to find the TM38 fire blast in Pokémon Brilliant Diamond and Shining Pearl, so now that we have reached the end of this article, we hope that you manage to find this item so that you can take out your enemies using it.