You can either repace every single art with the guide below, or just save the arts you want to use to your favorite folder, then when building the deck in the Deck Editor click Customize Images
Warehouse Krark's Thumb Krark, the Thumbless Mana Clash Mana Crypt Mana Screw Mijae Djinn Mirror March Mirrored Depths Mogg Assassin Molten Birth Molten Sentry Mutalith Vortex Beast Negative Zone Portal Odds // Ends Odds // Ends Okaun, Eye of Chaos Orcish Captain Planar Chaos Plasma Caster Pokey, the Scallywagg (playtest) Puppet's Verdict Rakdos, the Showstopper Ral Zarek Ral, Monsoon Mage Risky Move Scoria Wurm Setzer, Wandering Gambler Skittish Valesk Skyclaw Thrash Sorcerer's Strongbox Squee's Revenge Stitch in Time Tavern Scoundrel Tavern Swindler The Gold Saucer Tide of War Unleash the Flux
But one of my best friends (who hasnt collected cards since the days of base set) still has a shadowless Venusaur that I got him for his birthday (for $14)
if its a tie, the defender lives
Its the only ability of its type in Pokemon TCG Pocket and even if youre not planning to keep your Garchomp in the active slot, it can be handy for drawing into your Engine