Ice Beam can cause a deep freeze on your opponents in Pokémon Brilliant Diamond and Brilliant Pearl. It can be found in the mid-game of these remakes, so after collecting some cash, you'll be ready to dominate for Pokémon supremacy.
You can find TM13 Ice Beam in Sail Rock at the Department Stores. It is located east of Solaceon Town and north of the nearby coastal town of Pastoria, where the Great Marsh Gate is located. Once you arrive in the rocky Rockcup City, head to the Pokémon Center and go northwest to find the department store. It is yellow and green in color. Around it is a woman with a beautiful white dress and a pink bow on her hat.
Enter the huge shopping experience and find the elevator on the top right of the first floor. Go in and tell the polite employee you want to spend some money on the third floor. Once you are there, go to the bottom left of the room and talk to the cashier who is facing the camera. It sells a slew of powerful TMs that are ready to buy, including Fire Blast and Flamethrower. What we want to focus on is Ice Beam. In the list, it's below Thunderbolt and above Solar Beam.
Ice Beam costs $ 3000, which is a lot cheaper than Fire Blast and Hyper Beam. It also has a power of 90 and has a decent accuracy of 100. Unfortunately, the PP is quite low at 10, but you can always improve it with a PP Up.