We’re not adding any Cave shmup guest fighters to Xeno Fighters R. The way Cave games play is just way too different from what XFR is all about: things like switching shot types, medal systems, and other mechanics that XFR doesn’t use. Trying to squeeze Cave fighters into XFR would mean changing them so much, they wouldn’t really feel like themselves anymore.
So, bottom line: no Dodonpachi or any other Cave fighters in Xeno Fighters R. If you’re looking for a Dodonpachi-style crossover, check out GwangeDash instead.