Renaming Robo makes little sense story-wise though...Unless you just wanna be an ass to Marle or something because before you name Robo she says that R-66Y isn't good enough and then when you give her a new name she says it's perfect...>_>
Prometheus would be alright, but Robo seems to shun the name when Mother Brain calls him it...Like Magus before him, Prometheus was his old name. He is Prometheus no longer...now, he is Robo...and then there's a circuit in CC named after Prometheus...so...yeah...
*shrugs*
Although I did name Grobyc Robo once...I almost thought about naming him Obor though...Obor...hehe