>>15298765
>Which game is considered the best?
Most will likely say SB4 Sumeragi, the expansion of SB4. It's got the biggest roster, the most combat options and it's the most recent besides Yuki-den.
Personally I prefer SB3 Utage because the stages are more fun to go through, the item system is much simpler, won't force you to micromanage your inventory every time you clear a stage and doesn't have some of SB4's more dubious additions like analog waggling and rank.
SB2 Heroes has the most fun stages in the series but the core gameplay is severely outdated by the sequels.