Actually Nintendo builds each game from the ground up. They usually don't reuse engines. This gives them the most efficient engine for the project they are working on. So most of the early work is all done on the engine design. After that they start doing small tests on the engine with the new models for the games. They also always tend to make new models each time they make a new game.
Prepare for termination! It is the only logical thing to do, for I am only loyal to Megatron.







