Uh? Hello? Are you there? Get those HP EVs outta there, they won't help you much is what i'm getting at. Give it 252 EVs in defense so even the most powerful Explosion couldn't take you down. Maybe give it 128 Atk and SDef EVs. Give him Adamant nature so Stone Edge and Earth quake can do more. Maybe, if you want Toxic and Stone Edge to hit, give him the Wide Lens. It'll be unexpected and will help you in the long run
Floatzel is horrible with Choice Scarf, being fast as it is, it won't need it. Switch that to Life Orb. Also I'd take Bulk Up out since Floatzel is very frail and can't take hits too nicely. In case you get poisoned you should put Facade on him. With his high attack and a poison it should do butt loads of damage.
Dodrio isn't to frail, but it kind of is at the same time. Leave the moveset as it is. Change the EVs to 252 Atk 252 Spd 4 Def. Your Dodrio is fine.
I like your little combo with the Hypnosis and Calm Mind thing, the problem is, what if Hypnosis misses or if they wake up next turn? Change Timid Nature to Modest Nature so you can pack a bigger pawnch (lol).
Change Choice Band to Normal Gem or Life Orb. Your EVs are fine but your nature should be Relaxed. Other than that nothing much to change here.
Regice is hard body baby! (again, lol) Give him 252 SAtk 252 SDef and 4 HP. I'm guessing you like leftovers don't you? (it's cool, I like Life Orb) This set is fine, covers most, if not all, weaknesses
There is the long awaited answer.
If it doesn't help then I'm your guy to ask for more help :)