So, at present, characters from the japanese game Full Bokko Heroes X are split between two copyright tags, full_bokko_heroes_x and fullbokko_heroes, where the latter is the old name for the game. Neither one implies or aliases the other, so search results are messy.
To make things worse the character tags reference either of the names.
Furthermore, while full_bokko_heroes_x is currently the technically correct name, it had been pointed out in the past that "full_bokko_heroes" would probably be a better tag for simplicity's sake. The _x one could just alias to it if need be.
What tag should be used for the game?
Updated