It is difficult to determine who was wrong in this situation as we do not have enough information about the circumstances or actions of the monkey and the donkey. However, it is possible that there was something missing in their relationship that prevented them from becoming friends.

One possibility could be a lack of understanding or communication between the monkey and the donkey. They may have had different ways of communicating or different needs that were not being addressed. Without effective communication, it can be challenging for any two individuals to form a strong bond or friendship.

Another factor could be a difference in interests or compatibility. Perhaps the monkey and the donkey had contrasting personalities or preferences, making it difficult for them to find common ground. Sometimes, despite our best efforts, we simply do not click with certain individuals, and this could be the case for the monkey and the donkey.

Lastly, it is important to consider that not all relationships are meant to be. Sometimes, despite our desire for friendship, certain connections do not work out. It is natural for individuals to have different preferences and personalities, and not all combinations will result in friendship.

Overall, without more information, it is challenging to pinpoint who was wrong or determine what was missing in the relationship between the monkey and the donkey. It is possible that a lack of understanding, compatibility, or simply not being the right fit for each other could have contributed to their failure to become friends.