Everyone can participate in Galaxy Fight Club, If a player does not have access to any avatars, they will be given a default fighter with base stats and a default base tier weapon; if they have a partnered project’s avatar, they can play with that; if they have a Genesis Galaxy Fighter they can also play with that. The only difference is that the loot/rewards that you can earn from winning are different based on the avatar or weapon you play with (see Play To Earn section for more details)