Outperform the competition with Rolling in Pokémon Brilliant Diamond and Brilliant Pearl or any other type of repeat move? Well, we recommend that you find Metronome in the game as it will increase that Pokémon's strength. Thankfully, it's pretty easy to get.
You will be able to discover this highly sought after item in Veilstone City, one of the largest areas in the game. It is located east of Solaceon Town and north of Pastoria City. You can find Metronome on the eastern side of the city near the mysterious meteorites. There is a woman in a white coat next to an adorable Girafarig. You talk to the lady and after saying absolute nonsense about a pendulum, she will give you a metronome.
This casual act of kindness from a stranger is why you should talk to everyone in town. It sets a bad precedent for kids, who shouldn't be talking to random people on the street, but we'll let it go for now.
The metronome can be given to a Pokémon via the bag menu in “Other Pocket Items”. Once equipped, when used consecutively, it will give a boost to your chosen friend's attack. If you use a different move, the effect disappears. We recommend using Metronome with a Pokémon that repeats its attacks such as Rollout, which gains strength each turn it is used.
We recommend that you explore Veilstone City more to get moves like Fire Blast and special items like Wide Lens.