Alien Valky

Alien Valky is a glory-seeking alien that has appeared as an antagonist in the Ultraman franchise, first appearing in Ultraman Taro.

Ultraman Taro
Arriving on Earth, Alien Valky used his monster Samekujira to conquer Earth's oceans. As Samekujira was fighting Ultraman Taro, Alien Valky appeared to provide backup. Valky later retreated after Taro destroyed Samekujira.

Later, after Ultraman Taro turned in his Ultra Badge to the Mother of Ultra, Alien Valky attacked Taro's former human host, Kotaro. He was killed when Kotaro lured Valky into an oil refinery and blew it up by shooting it with his gun.

Ultraman Mebius
Alien Valky appeared to challenge Zamsher after he killed two Alien Magma. The two fought and, as with the Alien Magma, Zamsher triumphed, killing Alien Valky.

Mega Monster Battle: Ultra Galaxy Legends The Movie
Alien Valky appears as a member of the Belial Army. He attacked Ultraman Mebius alongside Birdon, Mukadender, Frogos, Gromite, Angross, Roberuga II, Lunaticks, Jasyuline and Cherubim. He was later killed by Ultraman Zero's Ultra Burst Attack along with Alien Guts, Fire Golza, King Joe Black, Zetton and Tyrant.