- Funimation licensed the television series, while Central Park Media originally licensed the OVA.
- Big Name Fan: Zack Snyder has stated that he's a fan of the series and cited it as an influence for Man of Steel—and sure enough, people have compared the fight between Superman and Zod at the end of Man of Steel to the fight between Birdy and Nataru at the end of season 2 of Decode.
- Doing It for the Art: Decode was commercially unsuccessful, but still produced a second season of excellent quality. Sadly, it looks like the series will have another cliffhanger ending.
- God-Created Canon Foreigner: Several original characters who made their first appearances in anime were designed by original author Masami Yuuki, such as Hikawa in the OVA, Shyamalan and Sayaka Nakasugi in Decode season 1.
- Keep Circulating the Tapes: Funimation lost the license for Decode in late 2016, meaning it can no longer stream the series or sell the DVDs. Likewise, the collapse of Central Park Media means the OVA is out of print, too.
- Name's the Same: This series doesn't star an English pop star, Leah's Mission Control, a bartender, a scarecrow, a Jetter, or an associate of Victor Creed.
- No Budget: A borderline case. Second season budget was significantly affected with the commercial failure of the first one, with a lot of cutting corner techniques applied to compensate. The artstyle is much more simplified, with infamously sketchy episodes 7 and 12 (the very final one) and regular lapses in animation all around entire season, with only simple static cues suggesting actual action. Those lapses are extremely jarring when compared with fluid and detailed animation of the first season.
- Playing Against Type: For both Kenichi Suzumura and Todd Haberkorn, their respective role as Satyajit Shyamalan, a villainous Smug Snake plotting mass genocide. Although for the latter, he's started playing roles in the style of Shyamalan more often since moving to L.A.
- Role Reprise: Decode features Mako Hyōdō reprising her role from the OVA series as Christella Revi.
Trivia / Birdy the Mighty