Suddendas

Suddendas (サドンダス): A Pteranodon monster of Neo-Shocker and GingaOh's vanguard. He could fly, teleport, and tun invisible. Destroyed by Skyrider's Pile Drop.

Conception
The pteranodon monster that would be known as Suddendas was initially conceived as Teranodojin (テラノドジン), who was represented by rough design drawn by Shotaro Ishinomori.

Suddendath
Suddendas received a homage in the form of Suddendath, the Mutamit form of Katal, a villain in Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max.
 * Furthermore, an upgraded version of Suddendath called Suddendath Beta appears in Kamen Rider Fourze Hyper Battle DVD: Rocket Drill States of Friendship. This homage is brought full circle in Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai, in which Suddendath Beta appears as one of the revived monsters of the Underground Empire Badan. When the 15 Heisei Riders and 15 Showa Riders unite to take down Badan, Suddendath Beta is seen fighting Skyrider.

Gerukadon
Suddendas highly resembles the Ultraman Great monster.