There are many antonyms for the phrase "more yoyo" depending on the intended meaning. If referring to an increase in the usage of yoyos, antonyms could include "less yoyo," "decreased yoyo," or "dwindling yoyo." If referring to an excess of yoyos, antonyms could be "limited yoyo," "sparse yoyo," or "scant yoyo." Other antonyms for "more yoyo" could include "less playtime," "fewer toys," or "reduced leisure activities." It all comes down to the context and intended meaning of the phrase.