Neither "Tackle RX" (the original name for the revamped and revived Tackle) nor Tiger Burai were originally conceived by Lewis Smith as part of "Return of Jetman", but they were folded into the series when the new version launched in 2002. The following pieces depict early concepts for the characters.
"Tackle RX" by Lewis Smith (1995-1998)Tiger Burai by Lewis Smith (1997-1998)Artwork © Lewis Smith.
Tiger Burai, Tigerseven, & Valcus © Lewis Smith. "Tackle RX" based on "Denpa Ningen Tackle" from KAMEN RIDER STRONGER (© Ishimori Pro./Toei). Tackle © Ishimori Pro./Toei.