Spyke, identified as Iwanoi in Japanese media, appears throughout the Medabots franchise. He consistently operates as a member of The Screws, fiercely loyal to their leader Samantha, whom he habitually addresses as "Boss." His primary function involves accompanying Samantha and engaging in schemes against Ikki's group, often providing comic relief through his timid personality and tendency to panic during confrontations. Early depictions highlight his poor Robattle performance, leading to repeated temporary expulsions from The Screws after defeats. This struggle partly stemmed from mismatched Medal types; his original Medabot, Cyandog, used a Monkey Medal intended for close combat, incompatible with its canine body designed for shooting. Recognizing this problem, he nevertheless refused to replace Cyandog's Medal, viewing this as abandoning a friend. He later upgraded to a Krosserdog body while keeping the same incompatible Medal, prioritizing loyalty over tactical efficiency.

In *Medarot Damashii* (*Medabots Spirit*), his combat skills show marked improvement over earlier portrayals. He achieves a training victory against fellow Screw member Sloan and nearly defeats two Kilobots in a match, only losing due to opponent cheating. He continues aiding Samantha in plots to gain favor with Kokuryuu Kamizake, demonstrating generally heightened competence. His role within the group remains steady; he supplies technical support when required, such as disguising himself as Space Medafighter X during the World Robattle Cup to covertly assist the protagonists. Specific episodes illustrate his influence on others, including Sloan's repeated losses to him motivating Sloan's Medabot, Totalizer, to run away to a junkyard, a detail omitted in some localizations.

His character remains defined by his activities within the group, without significant standalone development arcs or exploration of personal motivations. Details regarding his background, such as family or life outside The Screws, are not elaborated in the documented sources. Appearances in spin-offs or extended media beyond the core anime and games are not recorded.