It appeared for the first time during the second match between Raimon and Perfect Cascade used by Fei. Encouraged by Kinako's cheers, he used it to be able to Mixi Max to Big, as this one also had somesort of Keshin, looking like his deceased mother, Rockstar. Then, he told his Keshin he hated it, but needed its power and used his Keshin Armed to score a goal. Wonderbot commented it was difficult to use Keshin Armed and Mixi Max at the same time, but Fei passed through Perfect Cascade's players and scored a goal using Ouja no Kiba. Later in the match, he used Extreme Rabbit in Armed with Tenma and scored another goal to the adverse team.
Whilst Fei used this Keshin for the first time in episode 34, he looked up to it and said "I hate you... but I'm going to need your power, to protect my friends." He said this as his Keshin reminded him of his past when his father abandoned him, leaving him with a doll that resembled the Keshin, which is why he never revealed it until this point.