User blog comment:ChromastoneandTabby/BTFF RPG Progress Report - Rigon Boss Fight/@comment-3441048-20160117204206/@comment-1824169-20160117210037

They're able to transform at will.

The game essentially starts you off with every character, so you're able to arrange their formation at will.

The final game will contain 10 characters, 10 aliens, and numbers of bosses and locations I can't tell you about yet because spoilers.