- Marth Debuted in "Smash Bros.": So far, the only significant cameos that the game has made outside of Japan are in the DoDonPachi DaiFukkatsu BLACK LABEL arrange mode, which is a crossover with Ketsui, as well as a DLC pack for Dariusburst Chronicle Saviours.
- No Export for You: Ketsui: DEATH Label can be played on any region DS, but as for the Xbox 360 port of the original game, you'll need a Japanese 360 (or a modified one, if you're willing to risk getting banned from Xbox Live). The PlayStation 4 M2 Shottriggers port is also Japan-only. The PlayStation 3 port has no region lock.
- What Could Have Been: A PlayStation 2 port by Arika was planned, but cancelled, reportedly because the PS2 doesn't have the memory needed to do the background swapping in Stage 5note and Arika vice president Ichiro Mihara decided he would rather have no port than a slight Porting Disaster.
Trivia / Ketsui