Actually sooner or later the other Greeks adopted the Macedonian-phalanx.
First to proceed to this transformation,outside the Macedonians was Pyrrhos the king of Epirus.
Phoilopemen in Achaean Sypoliteia and Cleomenes in Sparta followed.

ps:what do u mean by "iphicrates phalanx" ? Iphicrates was responsible for major revisions i nmilitary tactics of the 4th cent-mainly the use of peltasts.
Maybe u mean the "loxe phalanx" (aslant). which used bu Epaminondas too.in this the one part of the line was consisting of more men in depth ,so as to beat the opposite part of the enemy,and then turn to its flanks.