We here at the Tri-State Gazette two years ago went about and did an article on making your own Phineas and Ferb Halloween costumes, because at that time, there wasn't much costumes of the licensed variety going around. And thanks to the wonders that is the intertubes, we have some examples of these. If you want to show us your costume after Halloween (and if you're under 18, get permission from your elders), drop it off on the Message Walls of me or RRabbit42 and we'll showcase them in the future.