Ah thanks about the explanations both of you !
SCOOTALOO : Area where we needn't go ? Maybe some areas on Terminus ? It's the first idea that has come to my mind ! But maybe there are other locations on the 7 worlds of PS III ? When you know the game, maybe you tend not to go to place you know you'll not be able to cross (especially the numerous blocked caves ! Strange there were so many...)
"Those enemies with no names and no locations are removed monsters." I didn't know about it ! Thanks about the explanation again !
And the exclusivity about some generations too !
SNORB : Ah ok I understand better now ! I still have the GBA verion of PSC but haven't played it for a while !