When Madame Odius approaches Sledge, his gun can be seen slightly pointing at her before he points his gun at her in the next shot.
The light in Sledge's mouth guard does not sync up to what he says during the entire introduction scene.
When the Rangers get their stars back, it doesn't show how Brody gets his star to morph into the Red Ranger.
At the end of the Dino Charge series the Rangers travel back in time and launch Sledge into the sun, which should have prevented him from ever going through the vortex created by the Dark Energem's destruction. If an alternate time line was created, then Earth should have also come out of the vortex since it also goes in at the end of Dino Charge.
Badonna states that she extracted all the Ninja Super Steel from the asteroid, but plenty was seen on the asteroid when Sledge left.