Nice team, but shouldn't Krookodile run enough speed to outrun Bisharp so a +1 / +3 Iron Head doesn't fuck it over? (And before you say you have a Quagsire, all it takes is a Grass Knot Bisharp and then everything dies, except maybe WoW Gengar I'll admit, but it still can't switch in. I'm sure the extra insurance would be greatly appreciated, especially considering how frail Gengar is.) You only need about 80 Spe EVs to outrun Bisharp, although zero speed investment is required on a Jolly-natured Krookodile. (This makes Taunt a lot more efficient against other stall teams as well.)
Personally Toxic over Heal Bell on Chansey -- I've only seen Heal Bell Chansey work well when paired with Mega-RestTalk Garchomp, as besides from hax-overload, spreading Toxic status (or Thunder Wave to stop sweepers and take some pressure of Quags) is usually going to be more useful.
I'd use Haze Quagsire and not Yawn because of Baton Pass, since they pretty much do the same thing (only with Yawn, and the opponent gets the advantage of sleep foddering whatever they wish -- mind you, you put SOMETHING to sleep, but the point still stands where Haze is slightly more efficient.)
Please note I don't play stall often, so I'm not the most qualified person for this. (Just because I understand how stall plays doesn't mean I understand the nit-picky stuff as much, which as kinda what this rate is.) Regardless, I'm glad to be seeing a unique stall team (I usually see the one you had in the first Teambuilding process 24/7, lol).
By the way, I'd like to stress how Manaphy weak you are when Chansey isn't running Toxic or Thunder Wave -- Manaphy at +6 wins hands down. You really can't afford not to run a status move on it, really. Otherwise you are REALLY hard pressed to keep Venusaur 100% healthy the entire game.
(Also I could swear I ran into this team before it was RMTd, but it wasn't the alt you advertised so I'm assuming this team has lost on another alt since I know for sure I beat this team -- Analytic Starmie pretty much won me the game, and I think bulky Mega DD ZardX easily set up on the Gengar, too, since you only have Quags for that (and I was running Taunt Bisharp on that team, so I stunted its Recover iirc). I'm not telling you what alt on Showdown I am though since it's not too important, lol, just felt like pointing it out.)