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People can play solo or in small teams, as:- Pilot, controlling their beast in the fights (probably turn based combat in matches).- Medic, controlling and/or choosing beast genetic or artifical enhancements.- Manager, organizing fights with other beast teams based on your experience/skill/hit points.- Roadie, team security and general tasks assigned by the manager.- Investor, sponsor or financial backer of the team taking a profit margin from each match.
The biggest problem is that Pokemon/Digimon is copyrighted, so it is troublesome/dangerous to use these.
Yes, more dark theme would be probably better.Or you could make mecha tournament game. Rather big audience (at least definitely bigger than dark beasts tournament genre) and easy to promote (target "mecha game" keywords and you should acquire players since there are no big "mecha" anime series right now to my knowledge, so general keyword would be sufficient).
As for the theme, I'm thinking of something more brutal, raw, and weirdly biological. Less "Pokemon" and more "Island of Dr Moreau". A dark and shadowy underworld with heavily modified beasts like those on Pandora in the Avatar movie.