In Don't Pierce My Flesh, Firey lands on Bomby's fuse, causing him to explode.
In Insectophobe's Nightmare 3, Gelatin tells Firey to go ignite Bomby. Firey ignites Bomby. Bomby shouts that Firey lit his fuse.
In Zeeky Boogy Doog, Coiny convinces Bomby to switch by threatening to ignite him with Firey.