PH34R BOT = FEAR BOT
Ph34r bot's head construction is reminiscent of Canti, the robot from FLCL, and Multi, the android from To Heart.
Oi = Hey
B4b3-0-r4m4 = Babe-o-rama
"Fly you fool" - Gandalf had a similar line in The Fellowship of the Ring, the movie of which had just recently been released.
Largo has the same reaction to Erika as he did in strip 23.