Flash Animation –
I used to make Flash movies and was upset about the Ipad not allowing flash movies, games, or applications. These days, you can view Flash but you either need to jailbreak, or do some extra questionable steps to get it to work. The ipad I have used shows it just fine, but still might not work for everyone, not worth the effort.
If your still interested in doing flash, maybe you would like to have the animation made in After Effects first. This would give you almost limitless special movie effects and then can be saved as a Flash file. Your animator should know how to add the fast load (I forget the actual name) that now comes standard with the program.
Google custom made After Effects animation.
If that won't work:
Google custom made Flash animation.