Once again, this question is probably not easily answered given gameplay variability, but we can ask a specific question that may illuminate the risk of Jirachi- EX : How likely is starting with Jirachi- EX
Prize Pig I expect that any green lifegain deck will be pleasantly surprised at how much extra mana Prize Pig will generate over the course of the contest
Though it isnt much use at all in the modern game, given its stats, its clearly a highly unusual Charizard, which is likely why its so valuable now
Cat Shark cannot be destroyed by battle if it has a Water-attribute monster attached to it as material, so its low ATK/DEF is usually not an issue throughout the game
With cards like Teferis Protection, The Great Henge, and Force of Negation, there is some spice to be had here
Luckily for the Yu-Gi-Oh anime, there were only a few scenes with guns