Singles with alterations should include a note on their listing and be judged based on the criteria listed above
Like most Pokmon cards, the value of Muk depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Plasma Freeze)
Fewer sealed packs exist each year, which limits how many more copies enter the market
The frame is double-sided: three cards on the front, three on the back
There are currently 11 types of Energy cards, which correspond to the same number of Pokemon types available in the game: Fire Grass Water Dark Psychic Fighting Metal Dragon Fairy Lightning Colorless Of all the energy types, Colorless Energy (which represents Normal-type Pokemon) is the most commonly used one, and it can be replaced by any energy type when performing attacks