>>713272293>everyAssuming you mean every available trait on the punnet square (facial differences), every alignment (Hero/Neutral/Dark + Str/Spd/Fly/Swm), the 'Character chao' (which I'm not sure you can get without modding, some IIRC are Phantasy Star exclusive), egg colors, mixes of those
-AND-
the 'Chaos' Chao, that would take you maybe 300+hrs (ignoring Chao exclusive to other games) of rolling the dice on; Black Market, Breeding, if you fuck up certain alignment requirements pre-evolution, and other menial shit like Kindergarten stuff.