I am always happy when I find a convincing way to give a typically off colour effect like card quality to a colour in a flavourful way
It can be played as part of Standard, Commander, Modern, or even rarer Magic formats like Vintage or Legacy
Basic Energy Cards have no description at the bottom of the picture and they can only provide 1 energy to the attached Pokmon
In general, when looking at power level, I considered the overall game plan, the synergy of the 99 with that game plan, things like interaction, ramp, mana base and card draw, the commander, and the power of the remaining stand-alone cards
The bright yellow of the moonlight contrasts wonderfully with the pale purples of the Ghost Pokmon, making for an incredibly pleasing card to look at