You can only have one in your deck, and they are usually very powerful, despite still being single-prize Pokemon
Even with Air Balloon, he would take 2 attachments to move, in which case you are already behind on when you want Rillaboom in play
Vial Smasher the Fierce seems like it would work better with Ludevic, Necro-Alchemist (and I honestly thought about pairing those two together at first), but hear me out
Graft is especially useful if you have another creature you want to pump up
All of these cards are permanents that want to win on the upkeep, which gives your opponents a whole rotation of the table to either whittle down your life total or remove the offending win condition
Cloud is all about Equipment, with every Cloud card in the Final Fantasy set revolving around Equipment in some capacity