Mostly it is just two bodies on a very cheap card
There are quite a few decks revolving around this type of Energy, so beware
1 Guardians Rising Guardians Rising is likely the very best of the Sun & Moon era, even challenging Forbidden Light in terms of sheer quality
Artist booota decided to give Pikachu a confused and almost worried expression, like maybe it might be lost, which makes this card feel unique in comparison to other Pikachu cards
30-year nostalgia factor Reprints or references to Base Set, Neo, e-Series, and other classic eras could drive massive demand from returning collectors
Of course the downside is that opponents can take the initiative and then start cruising through Undercity themselves, but that just makes the game more interactive and fun