He is a green Elmo with a pink flower.
So far, they have not interacted, but Robert dislikes Wabemo because he thinks there is enough Wabe. However, Robert started liking him after the events of The Wabe Movie.
The Wabe Movie
In The Wabe Movie, Wabemo encourages people to conserve the Wabe and eat less animals. In the end, there is a massive thirty minute gay orgy of Wabemo penetrating the poor animals. Cory from the famous Anime Cory in the House joins in with his mega presidential penis and penetrates the poor animals, while Wabemo chants "Go Cory, Go!".