Su, convinced she is going to have to face Tama-chan down at some point (Su wants to eat her), has designed multiple mechanical versions of Tama. Every Mecha-Tama has turned out to be dangerous to the residents of the Hinata Inn. Mecha-Tama-Chan 0 (a prototype): Volume 11 Mecha-Tama-chan 1: Volume 5 Mecha-Tama-chan 2: Volume 5 Mecha-Tama-chan Mark 3: Volume 7 Mecha-Tama-chan 4: Volume 8 Mecha-Tamago 5: Volume 13 Mecha-Tama-chan 6: Volume 14 Mecha-Tama-chan 30: Volume 14 Apparently, Su has been developing Mecha Tama-chans during the three years that pass since the end of the main story until the marriage of Keitaro and Naru, the latest version being the 30th. Source: Wikipedia.