BC-04

SJ-05 is Stag Buster's Buster Vehicle. It can be piloted and can transform into a variety of forms each with its own function, chief of which is SJ-05 Stag Beetle.

Buster Machine SJ-05
It was piloted by Beet Buster it goes into "interface" mode.

Buster Animal BC-04 Go-Buster Beet
It can also transform with Rhinoceros Beetle into an Animal Mode- the BC-04 Go-Buster Beet.