Gilded Goose doubles as mana and food production, so its a no-brainer
Jirachi is a risky card admittedly, but the speed that it can bring to a deck is definitely something not to be overlooked
Moreover, its Shadowy Spellbind ability keeps Supporter cards at bay so the opponent cant use stuff like Lillie, Red, Mars, Cyrus, etc., throwing their strategies out of the window
Theres even a sneaky combo in the deck that uses Argothian Elder and Maze of Ith: attack with the Elder, then while attacking activate the Maze to untap the Elder
When I first got my hands on a Dark Machamp card, specifically the 2000 POKEMON ROCKET #10 DARK MACHAMP - HOLO 1ST EDITION, I was immediately drawn to its powerful attacks