Apple Ape did not originate from fanon, and the information on this page may not be entirely accurate to their canon. You may read more about this subject in the context of their canon on the following wiki(s):
The Apple Ape (Ringosukī in Japanese) is a type of enemy found in the game Wario Land 4. In Wario Land 4, they toss apples which would turn Wario into Fat Wario if he were to ingest them, which he could use to defeat enemies by running into them and breaking blocks without a ground pound. They did not produce any coins when defeated and were needed to progress through the game.