Early Radio Tower for MBall + Double deposit + back near central hallway : 
										54.06s 	/	 0.26s
Goldenrod mart :						 0.00s	/	49.20s
Menu after "shopping" (white screen) :	 9.81s	/	 7.92s
Center in Violet :						 0.00s	/	25.14s
Violet mart :							19.91s	/	 0.00s
Sudowoodo :								 8.26s	/	13.36s
Morty troll :							 ?????? /	 0.00s
Poliwag :								 0.00s	/ 	34.60s (Hypnosis miss, no flinch)
Ecruteak movement :						 7.54s	/	18.36s
Gyarados menu :							21.68s	/	 3.60s
									-------------------------
									   121.26s	/	152.84s

Conclusion : If Morty trolls for less than ~30s, MBall is faster.

N.B. : Poli can still troll (time to search for one + time if it gets out of ball(s) not counted in this paste), but L15-17 Poliwag saves time for teaching one of the HMs.