One of the most powerful normal-type attacks is Hyper Beam. While some Pokémon can learn it naturally, a TM is always a good way to ensure your team has such a powerful move at its disposal. Fortunately, TM15, which contains Hyper Beam, is easy to find – you just need to have enough money to purchase it.
TM15 is sold at the Veilstone Department Store. Veilstone is a relatively early-game destination. You’ll head there to challenge the third gym leader, Maylene. The Department Store will be ready
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