This article is about a/an transformation item in Kamen Rider Den-O.
Zeronos Card

The Green and Yellow Zeronos Cards which allow Zeronos to change into his Altair and Vega Forms

Zeronos Card (ゼロノスカード Zeronosu Kādo) are a transformation card item used by Yuto Sakurai, also known as Kamen Rider Zeronos. These cards allow him to switch from his Altair, Vega, and Zero forms. Unlike Den-O or some other Riders in the series, the Zeronos cards have a number of times they can be used and once its energy is used up, he can no longer use the card as it dissolves away upon ejection from the belt.

New Zeronos Card

The Red Zeronos Card which accesses Zero Form

These cards are made from the memories of Yuto's existence, thus if they're completely exhausted, Yuto risks ceasing to exist in the minds of those he cares about that are not Singularity Points. Later, he gets a set of red Zeronos Cards from his future self that use his own memories to change into Zero Form.

In Kamen Rider Den-O: I'm Born!, Yuto demonstrated Zeronos cards can be used in place of a Rider Pass to traverse time by inserting them into the Rider Pass slot of his Machine ZeroHorn.

Icon-den-o Kamen Rider Den-O
Singularity Points
Ryotaro Nogami - Yuto Sakurai - Kotaro Nogami
Transformation Gear
Den-O Belt - Rider Pass - Climax Cellphone K-Taros - Zeronos Belt - Zeronos Card - New Den-O Belt - Gaoh Belt - Yuuki Belt - G Den-O Belt
Combination Armament DenGasher - DenKamen Sword - ZeroGasher - Denebick Buster - Combination Armament New DenGasher - GaohGasher - Combination Armament Nega DenGasher - Savage Gasher - Combination Armament G DenGasher
Rider Machines
Machine Den-Bird - Machine ZeroHorn - Machine New Den-Bird - Machine GaohStriker
Time Trains
DenLiner - Zero-Liner - New DenLiner - GaohLiner - Nega DenLiner - Ghost Train - KingLiner
The Ally Imagin and the DenLiner Crew
The Taros: Momotaros - Urataros - Kintaros - Ryutaros

Other: Sieg - Deneb - Teddy

DenLiner: Owner - Naomi - Hana - Station Master
The Imagin
Contract holders
Death Imagin - Kai
Bat Imagin - Chameleon Imagin - Crust Imagin - Crow Imagin - Rhino Imagin - Ivy Imagin - Owl Imagin - Whale Imagin - Wolf Imagin - Jelly Imagin - Tortoice Imagin - Scorpion Imagin - Spider Imagin - Bloodsucker Imagin - Molech Imagin - Cobra Imagin - Salamander Imagin - Gecko Imagin - Newt Imagin - Wasp Imagin - Bluebird Imagin - Rabbit Imagin - Anthopper Imagin - Kraken Imagin - Mole Imagin - Leo Imagin - Panda Rabbit Imagin - Snail Imagin - Oct Imagin - Armadillo Imagin - Albinoleo Imagin - Snowman Imagin - Pink Rabbit Imagin - Clown Imagin - Ghost Imagin - Phantom Imagin - Shadow Imagin - Piggies Imagin - Mantis Imagin
Evil Riders
Gaoh - Nega Den-O - Kamen Rider Yuuki (Skull Form) - Kamen Rider Yuuki (Hijack Form) - Kuchihiko - Mimihiko - G Den-O
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