Here are just a few goofs, I am not planning to show all of them. I am aware of Zordon disappearing in wide shots of Ivan attacking the Command Center, the Rangers having rollerblade gear teleporting and reappearing without it, etc.
Here where the Ape Zord is on the top of a building, Red looks down at the Ectomorphicon, we see there is no street under the robot, just lines--this is the animation grid, it had not been rendered yet. Or they didn't put the street under it.
This is not a goof, Ninja Megazord crashes through a building, it isn't a CGI robot, probably the toy or a prop, looks a bit irregular.