Magneton is card #153 of 215 in Scarlet & Violet Black Star Promos (2023), a Promo. At about $6.36 it is the #41 most valuable card in the set. It is one of 45 Magneton cards printed so far.
1999Base Set
2002Legendary Collection
2004Team Rocket Returns
2007Power Keepers
2013Plasma Storm
2018Ultra Prism
2022Astral Radiance
2023151

















See the full Scarlet & Violet Black Star Promos card list
An ungraded Magneton from Scarlet & Violet Black Star Promos sells for about $6.36. A PSA 10 is worth more, roughly $22.26 by our estimate, and a PSA 9 around $12.72.
It is a Promo.