rainbowdash90

i've recently been thinking about a movie that i saw as a small child. all these websites and not one has helped me in any way with this! it's a movie with animated animals, this is a pre-2000's movie. i don't believe it's disney in any way shape or form. i have a vague memory of it so i'll try to describe as best as i can. it's about a character set in some grungy london type place, very dirty dark city looking place, and a baby was just born i believe. well the main character has a mentor whom i believe was an monkey/ape, who was always holding an umbralla. one part the character was calling out to their mentor and the mentor/aquaintance was leaping building to building singing and giving advice. i hope someone has a vague idea of what i am talking about! this might be a 70-90's animated movie. please help!