Choco, if the answer if chocobo you shouldn't feel ashamed as chocobos are different in each <acronym title="Final Fantasy">FF</acronym> universe if I'm not mistaken (I've played <acronym title="Final Fantasy VII">FF7</acronym>-<acronym title="Final Fantasy IX">FF9</acronym>, no others).
This is a Final Fantasy VII forum. So the difference line only counts for Final Fantasy VII. I am not that inhuman to make a multiverse riddle. And actually Chocobos always are very similiar, but yes, the physical appearance I ask for in the riddle is really about "I look totally equal to my brother in your eyes, Cloud (and the others)". Well, the guy i am looking for is even more similiar, but I'm telling you too much about it and then it could be too easy.