Gasdan is a type of Green Gas which can be found on the planet of Hatlinks it also has the effect of stopping any kind of Zombie. It was used when the Rivers found themselfs up fighting the zombies of Dr Ragan in 2001 Scott Curtis said to the rest of the Rivers I wish we had some Gasdan so we could stop these but without out Hatlinks this isn't going to be easy. From Proposals for new Wikia sites, a Wikia wiki.