If anyone can remember back to 1993, a time before the first Balto came out, you should also remember this other one of Amblimation's masterpieces. Produced by Stephen Spielberg, and based off the 1987 children's book by Hudson Talbott, it's truly a remarkable story.
A vicious Tyrannosaurus Rex (Named Rex. XD How orginal.) is visited by a small alien that feeds him what's called
Brain Grain, a food that increases the intelligence of whoever eats it, making him -- along with a bunch of other dinosaurs -- friendly, talking creatures, who are then transported through time to New York. If I reveal anything else, it will ruin the story...
...which will get me REEEEEAL pissed, because I've been wanting to see this movie again, and I've been looking all over my house for EONS, trying to find my copy of this exrtaordinary movie, but it's vanished off the face of the Earth. If anyone remembers it, please share what you thought about it -- so long as you don't include any spoilers. XD
The Original Book Cover:

The Original Movie Cover:

(as you can see, they booted out the brontosaurus, stegasaurus, and whatever that thing is that's holding the map. XD)