Dragon Rage - The large roller coaster. While waiting in line, the place is decorated to look like a lakeshore, with video clips all the way up to the ride from "documentaries" and "new shows" warning that lately people have been provoking Gyarados and have suffered serious consequences, it's dangerous to provoke a Gyarados, they're naturally angry etc etc. The roller coaster cars are designed to look like a Gyarados, and it's one of those roller coasters that starts fast and stays fast the entire time. With a dip into a tunnel that makes it look like you're underwater and in danger of having a bunch of Gyarados gang up on you to add to the danger aspect.
And all of the cars have to be blue except for one, which would be red.
There should be something called The Sky Drop, which is one of those rides that lifts you high up on the outside of a tower and then just drops you (safely, of course).
There should be bumper cars with different pokemon designs to them: Relicanth, Nidorino, Wobbuffet, Rampardos, or whatever.