The Simple Answer So, pokemon foil vs holo comes down to this: holo usually means the artwork is shiny, reverse holo means the rest of the card is shiny, and foil is the broader umbrella term that can cover both, plus other shiny variants
Each has VSTAR power, special attack, or ability that can significantly alter the course of a battle
Usually there will be an even effect for each player including the archenemy and/or their opponents, for a certain duration or instantaneously
Courtesy of Wizards of the Coast (WotC), Commander at Home, Rebell Son, Loading Ready Run, and The Command Zone, take a look at all the new cards and full Commander Deck reveals from Murders at Karlov Mano r
This frame isn't suitable for graded cards in cases, like PSA and similar