Continuity mistake: Whit and April are fighting by the spring, and just before it cuts to Mitsu preparing an arrow, Elias Koteas is pounced by a guy wearing colorful rags in black, orange and yellow patchwork, a blue and white pattern bandana and black and white striped legwarmers. Behind Mitsu, meanwhile...a guy with the same horrid fashion taste is charging. What are the odds. (00:39:35)
Continuity mistake: In Niles' POV, during their first confrontation in the middle of the village raid Walker on his horse is in the shade, facing Michelangelo in sunlight. It's the opposite in their respective close-ups. (00:44:15)
Continuity mistake: Leonardo picks Yoshi up from the ground after reviving him; his bandana goes down his left shoulder, but in close-up goes down both sides of his neck. (00:48:30)
Continuity mistake: When Raphael meets Yoshi and talks to him about being a kid and having fun, if you look at Raph's wrists you'll notice that he is not wearing any wrist bands as he usually does as with the rest of the turtles. However, when Raph puts his hand on Yoshi's shoulder there is a close-up of Yoshi's head and shoulders. Look at Raph's wrist in the close-up and you'll see that a wrist band has appeared. When the shot changes back, his wrists are bare again. (00:56:50)
Continuity mistake: Raphael points out that Yoshi is no 'senior citizen'. He adds "Come ooooonnn..." and in the passage from one angle to another Raph's bandana moved from the front to the back of his shoulder. (00:56:50)
Continuity mistake: When the Turtles are climbing the wall to get into the garbage-chute that leads to the prison, you can see Donatello's bandana tail hanging down towards the wall just as if they were crawling on the floor. (01:09:05)
Continuity mistake: After learning about their supposed ancestors, the Turtles begin fighting Norinaga's guards. Michelangelo is the first one in their way and is at a standoff with one of them who has his sword raised, and still the following shot shows exactly Mike facing some enemies that run at him. (01:13:10)
Continuity mistake: In the fight alongside Mitsu, Donatello beats up some soldiers by the table with the scrolls ("Bases loaded, home run"). The scroll is placed in a different, more orderly way than before (when it was on top of another parchment). It wouldn't tidy itself up during the fight. (01:13:40)
Continuity mistake: The goons with guns arrive at the castle, "There goes the neighbourhood", quips one of the heroes. In one shot Raphael sidesteps towards Michelangelo to reach his arm, in the reverse it's Mike and Don who are restraining Raph from charging. Same mistake happens a few seconds later, when Walker delivers his "Who's your tailor" line and Don is restraining Raph, or not. (01:17:35)
Continuity mistake: In the baffling phase when Whit takes exception to the killing if it's done by guns and Walker just throws him with the others, Elias Koteas moves his gun from the left to the right hand when Stuart Wilson calls for Niles, but in the next shot the gun is much lower. (01:18:15)
Continuity mistake: Leonardo ducks the cannon shot tucking his head inside the shell with the bandana going in front of his shoulder, but he emerges with the bandana on both sides of the neck later. (01:19:50)
Continuity mistake: For his curtain call, Stuart Wilson acts in close-up like he's losing balance, body arched back. The impact looks all different in the wider angle. (01:22:50)
Continuity mistake: When Benkei climbs the sewer ladder and disappears into the light, Donatello is touching the ladder in the first shot, in fact he puts both hands on deliberately, but he's not even touching it in the second. (01:28:35)
Continuity mistake: When Michelangelo's rolled over by Mitsu after being knocked off his horse, his samurai mask is under his chin. A shot later, after the camera's on Mitsu, it's suddenly gone.
Continuity mistake: When Mitsu removes Raph's helmet, she grabs the lower edge of it. Shot changes and her hand is positioned higher.
Continuity mistake: April is moving the iron sewer door but from the opposite angle the door is lying still on the floor despite her pants of effort and despite the fact that a shot later the door has been moved.
Continuity mistake: When Michelangelo is about to be lifted on the cart Mitsu raises her hand and commands something to the soldiers. A shot later her hand is lowered.
Continuity mistake: When Michelangelo is about be knocked down by Mitsu, the galloping horse arrives at where the camera is and comes to a stop. When the shot changes he is galloping again.
Continuity mistake: When Michelangelo drops the sceptre it lies perpendicular to some green leaves. When Mitsu picks it up the leaves are on the left.
Continuity mistake: Mitsu picks up the arch that's lying against the tree, but it wasn't there when she knocked down Michelangelo.
Answer: Michelangelo wants to stay behind for the same reasons as Raphael: because in that time and place, they are well respected, even revered as heroes. They can live openly and not be banished to sewers or subway stations.
LorgSkyegon
Mikey didn't want to stay behind because of Yoshi but because of Mitsu. Raphael even points out that she's the reason he doesn't want to return. When Mikey says they should stay, Raph responds, "Now, forget about Mitsu and give me the scepter."