These aliens were unused concepts submitted by fans for members of the Ace Killer Squad, in the ULTRAMAN manga.
ULTRAMAN: BE ULTRA Alien Mukishibara | Alien Ruboia | Alien Alteric | Alien Exbes | Irindo | Alien Guinpe
Symphogear XD Unlimited Norazam Alien | Ifro Alien
Episode Tiga Alien Ruboia | Zoiger | Gatanothor
Episode Zero Alien Mukishibara | Iwatesujo | Legionoid | Alien Magellan Maya | Alien Togarame | Alien Exbes | Alien Guinpe
Special Edition Pedoleon | Magnia | Darkgone | Alien Magellan Maya | Mecha Telesdon II | Alien Arteric
8U Arc Darkgone | Hotarunga | Gilanbo | Lethe | Grand King | Space Moths | King Kappa | Mururoa