- 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.
- Keep Circulating the Tapes: Funimation lost the license for the series in late 2016, meaning it can no longer stream the series or sell the DVDs.
- 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.
Trivia / Birdy the Mighty