You'd be surprised to find how many NPC models are in the game that we don't particularly see all that often. My guess is they're just a few of the several backround characters we've seen in the game every now and then. Like during the ending, there were a lot of backround characters that only really appeared then (as well as baby King of Sorrow, which to this day I cannot comprehend why).
I'm just sayin', that second NPC has a really big feel to what an average a La-lakooshan would look like, compared to Lolo, like how a Breezegalian would look compared to Klonoa.
Also, I don't know what's up with that first NPC, but I do think he showed up in the credits...maybe.