I have made a Neos deck and this is it. I haven't been able to test it yet. Enjoy.

Monsters:

     Elemental Hero Neos

     Destiny Hero Dasher

     Elemental Hero Necroshade

     Elemental Hero Neos Alius x2

     Regulus

     Elemental Hero Sparkman

     Ghost Gardna

     Zero Gardna

     Neo-Spacian Dark Panther

     Neo-Spacian Grand Mole

     Shield Warrior

     Neo-Spacian Air Hummingbird

     Neo-Spacian Aqua Dolphin

     Neo-Spacian Glow Moss

     Vortex Trooper

     Chrysalis Pantail

     Chrysalis Mole

     Chrysalis Chicky

     Chrysalis Dolphin

     Cross Porter x2

Spells:

     Field Barrier

     Nex

     Neo Space

     Reverse of Neos

     Contact

     Convert Contact

     Terraforming

     Dimension Explosion

     Hero Mask

     Common Soul

     O-Oversoul

     Fake Hero

     Cocoon Party

     Instant Neo Space

Traps:

     Spellbinding Circle

     Ordeal of a Traverler

     Limit Impulse

     Elemental Recharge

     Ultimate Offering

     Scrap-Iron Scarecrow

     Hero Barrier

     Elemental Absorber

     Cocoon Veil

Fusion Monsters:

     Elemental Hero Chaos Neos

     Elemental Hero Storm Neos

     Elemental Hero Marine Neos

     Elemental Hero Air Neos

     Elemental Hero Glow Neos

     Elemental Hero Dark Neos

     Elemental Hero Grand Neos

     Elemental Hero Aqua Neos

     Neo-Spaceian Marine Dolphin