DB Legends Unity Data Extract & Zip Download
Unpacked all the Unity "MonoBehaviour" files I could identify & created a Zip File with em all for who ever wants to dig around. So far I have noticed the files with all uppercase names have the most human readable type information. I think the repeat files with #NUMBER after them are the newer versions that were updated while the game was going on, like data downloads.

CHARACTER-NAME #31705.txt
I will be writing some code to parse as much of this data as possible & automate what I can to construct into the legends site so it will be easier for everyone to read. Have not come across the card specs yet though.
Files worth checking out
- ELEMENT-NAME #31730.txt
- GASHA-SERIES-NAME #31747.txt
- MISSION-SET-NAME #31750.txt
- ONL #31784.txt - basic info on matches/ratings/rankings
- SEASON-NAME #31760.txt - seasons..? dunno
- STG #31723.txt - stage location names
- STORY-EPISODE-NAME #31712.txt & STORY-GROUP-NAME #31733.txt - story/book/chapter names
- TIPS #31783.txt - mini helpers
I'm sure there's a lot more in there. Feel free to comment on your findings! Hopefully someone will find the gold haha