Heh heh. Ah, there are so many fond memories there... Quite possibly my favorite PSX game. Now if you are referring to the yellow dinosaur starter, the name is Agumon.

The poop and toilets are likely there to preserve the monster care aspect of the original digital pet devices. Or maybe for the Care Mistakes to gain certain Digivolutions and... uh, lets say 'unusual' mechanics of Numemon and Sukamon. Besides, Porta-Potty items are a thing, you should stockpile several.... especially because there always seems to be some asshole wild Digimon camping the crapper for a chance to mug you.

Really I think the only major flaw to this game was how bloody convoluted it was to obtain certain Digimon. Maybe it's a trick of forgetfulness, but I can't remember the first Digimon World ever being upfront with me about Digivolution requirements aside from age. Yet it felt so worth it when I first stumbled into evolving to the Ultimate level and went about solving at least a third of File Island's problems with MetalGreymon.