This episode is the start of the changes that were going on with black and red morphed no voice overs with yellow following next episode. This is due to the disputes over money for the future movie.
Last time we hear Trini voice as she morph into action while fighting. No red and black voices while fighting or inside tge monsters belly. Yoy can yell by the footage used that red and black are trying to say stuff but no voices are used in the belly of the monster. Future episodes have different people doing overlapping voices for red, black, yellow.
This episode is the start of the changes that were going on with black and red morphed no voice overs with yellow following next episode. With the exception or reusable footage for things like calling the zords or weapons to form the power blaster This is due to the disputes over money for the future movie.