>>11461293kenga is probably the symbol of same-sex specie
it's literally a mother
also some genders has actual in-game consequences which is a fun fact. for example, battle bond greninja can only be male. therefore if you use greninja you'd always want it to be a male, because if you use q female you reveal to your rival that you aren't a battle bond greninja and let him play accordingly and basically get a free scouting turn