A metronome.

Tempo is measured in the number of beats per minute. Metronomes were traditionally used to do this, but it is more common to use music sequencers to do so now.

It is a metronome.

That depends what kind of metronome you have - which is partially based upon how old the metronome is, and partially based on the necessary precision. Taking a standard example, my metronome consists of the numbers 40 and 42, and from then on, the multiples of 4 from 44 to 208.

The sum of these numbers is 5374.

the item Metronome will power up any moveused in a row, so the move metronome will be powered up. or rather, the move metronome turns into will be powered up. if metronome turns into anything other than an attack move, the next metronome will be powered up instead.