The first new stage for Super Smash Bros. Ascension is Heart Gold & Soul Silver. The level is simple, there is one big platform and two tiny ones above it. The level will switch from Ho-Oh to Lugia at some parts. There is no hazards on this stage though.
Credit to Smash Vault user Mewtwo2000 for making the stage and Smash Boards user bbQ~ for making some changes on it.