stage connection
A grouping of characters from the same stage or level appearing together.
This may include characters from the same game (e.g. stage 6 bosses), or crossovers between characters from different games (e.g. both stage 5 bosses in different games).
Examples
- Danbooru post #599038: Stage 6 bosses
- Danbooru post #3623797: Stage 5 bosses