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A longtime Transformers fan, Guidi was brought in by Dreamwave Productions to be artist for their Transformers: Armada comic, doing issues #8-13 and returning for #18 after a four issue run by Don Figueroa. When the title changed to Transformers: Energon he drew the first two issues (#19-20) and #22. He also contributed heavily to both the G1 and Armada More Than Meets the Eye series. He was scheduled to take over from Figueroa as artist on Dreamwave's G1 ongoing series , but Dreamwave went out of business before his work could be published.