Unimen?!

Lately Logan has been jumping up onto my couch and saying to me "help! help! A unimen! A unimen!" This has left me quite perplexed as I had no idea what a "unimen" was. I didn't know if he was trying to say unicorn and just not getting it right or what. Then the other day we were watching "Go, Diego, Go!" (which Logan likes a LOT but it rather annoys me so we haven't seen it in awhile) and this penguin Diego was rescuing says "Help! Help! Ayuda me! Ayuda me!" Ah-hah! Mystery solved!