The noob: it moves like a pawn and can promote to a king or itself or the normal pieces when moved to the middle of the board(for white the 5th rank, and black the 4th).
The oobnay: it moves like the noob and can capture backwards 2 squares.
The obnayoay: it moves like an oobnay and the alien đź‘ľ.Â
The bnayoayoay: it moves like the killer and can bomb a 3x3 square(it doesn’t get bombed itself, surprisingly).
@dengeth, oops, basically