Mini (ミニ Mini?) and Mum (マム Mamu?) are green and blue colored, flying robots who serve as Captain Whisker's first mates. They are helpful to the Captain, who would be lost without them. Mini sits on the Captain's left shoulder, and Mum sits on his right.
Mini and Mum are perhaps more alert and scheming than they appear. They are Eggman and Eggman Nega's robots, created to help Captain Whisker retrieve the Jeweled Scepter (which was in Princess Blaze's possession) in Sonic Rush Adventure.
- Their names are a pun on the word "Minimum".