In versus mode/arcade mode, you can unlock enemy captured mobile suits by beating the arcade's 13 missions with either team. Beating it with Zeon's forces gets you enemy captured units, from the Ball, to RX-78. Beating arcade with the federation gets you enemy captured Zeon suits. These sets work in vs, and arcade.
You can find Mobile armors throughout the various arade missions. Armors included are the Zeon Zakrello, Braw-Bro, Bygro, Big-Zam, Grabro, and Adzam, and the Federation's G-Sky, G-Bull, and G-Fighter. To unlock these, play as either the Principality of Zeon or Earth Federation forces. Each side can gain the other sides mobile armors if, in any mission, a mobile armor is targeted by the player (these are red on the radar, not purple), and are destroyed by the player- Not by the player's ally. To avoid letting the CPU ally destroying the MA you are trying to receive, set you ally to hide, and finish the armor as quickly as possible. When selecting the first stage in arcade mode, the player will trigger a set course of stages and enemies to encounter. Play through all four, searching for Mobile Armors. Here is an example of where mobile armors can be located...
ESFS
stage 1- INSIDE SIDE 7: the tough enemy on this level is Char's Zaku II
stage 2- Satellite orbit 1: the tough enemy on this level is also Char's Zaku II
stage 3- New Yark ((New York)): the tough enemy on this level is Char's Zaku II
*stage 4- Taklamakan Desert: the tough enemy on this level is the mobile armor "ADZAM"
stage 5- Forest in E.Europe: this level consists of many Dom suits
*stage 6- Belfast: the tough enemy on this level is the mobile armor "GRABRO"
stage 7- Outside Jaburo: the enemy on this level is Z'Gok
stage 8- Inside Jaburo: the tough enemies on this level is Char's Z'Gok and the Zok
stage 9- Side 6 Space: the enemies on this level is the MS Dom
stage 10- Solomon Space: the tough enemy on this level is Char's Gelgoog
*stage 11- Solomon: the tough enemies on this level are the mobile armor "BIG-ZAM", and the MS Gyan.
*stage 12- A Baoa Qu Space: the tough enemy on this level is the mobile armor "BYGRO"
stage 13- Inside A Baoa Qu: the tough enemy on this level is Zeong
**the mobile armor Big-Zam cannot be damaged with beam rifles or beam cannons. Only ballistic weapons can damage it, for Big-Zam has an I-feild**
