How do you get the R-1 in Super robot taisen Original generation for the gba

You just have to wait cuz you'll get it in mission 10-20 it isn't a secret robot so don't worry about gettin it.R-1 is rubbish anyway it doesn't have much space for weapons. there is a weapon it gets after an upgrade. It's T-link sword and it looks rubbish.who THROWS A SWORD!!!!