He looks exactly the purebred Holland Lops I have seen with ear control. He just has that classic Holland look...pet quality but Hollandy nonetheless. Look at the ear shape in the last picture where his ear is standing up... that's the exact ear shape the Holland people want but it's sticking up...
Something about him is just screaming Mini Lop, even though he has helicopter ears...could be a ML mix with a tight crown. I think it's the face and thick, short ears that are getting me. How much does he weigh? Holland possibly?
A self chin is exactly what it sounds like - a chinchilla with the self gene instead of thecorrect agouti gene. They look just like normal blacks and can be shown as a black as long as the eye color is correct...sometimes self chins get blue or marbled eyes which would be a DQ since they are...
Your Bowser is definitely a girl. ;)
Can you feel more than 1 or 2 "marbles"? You should get her checked outeither way but chances are if you can only feel one or two you'reprobably feeling her kidneys.