By Joseph Walter
In a nutshell, the teenagers with attitude, like all teenagers with attitude, have volunteered to be trick-or-treat chaperones for the youngsters in Angel Grove. Tommy, the only character the show seems to care about anymore, arrives and greets his pals.
So after rejecting Goldar's plan, Zedd decides they should send a team of Putties down, disguised as Power-Rangers-costumed Trick-or-Treaters and... wait a minute. This is almost identical to Goldar's plan. Man, Zedd really is an asshole.
Anyway, Tommy is now absent-mindedly talking to himself (since the Putty kids don't speak) while being completely oblivious to the assassination plot that he's in the middle of. Without warning, Goldar shows up and the kids reveal their TRUEUEEU FORMSS!1 as Putties. A classic, spin-kick-fueled Tommy fight starts and Goldar, taking a note from his boss, does nothing but sit back until the Putties get the crap kicked out of them. YOU COULD HAVE HELPED, YOU BASTARD.
That's when things get weird: Zedd, using a monster made of a lock and key, who is completely unexplained and (as far as I know) never seen again, opens up "another dimension" (of which Zedd and Rita own countless acres of real-estate) by sticking a key in a grave stone and then locking Tommy in there with a bunch of recycled monsters from the past.
You see, this episode suffers immensely from the problems that are prominent throughout all of Season 2. Even worse, it takes place during the dreaded "Peace Conference" arc where the beloved Zack, Trini and Jason are sent away from the Rangers to help world peace (when, in actuality, a dispute regarding unionizing the series got the actors forcefully ejected and haphazardly replaced with body-doubles, terrible voice-acting and almost no presence whatsoever) To make matters worse, many of the Zord battles in Season 2 use the exact same footage of the Thunder Megazord, and then cut away to shots of a monster, sometimes from a completely different season, that it straight up isn't fighting. This wasn't noticeable as a kid, but good God, four-years of film school will ruin almost of Season 2 for you.
Lastly, the episode uses this perfectly subtle use of a brief green tint on Bulk and Skull's faces after eating too much candy in the familiar "bulk-and-skull-get-made-fun-of" conclusion to the episode. It's a simple effect, but has a surprisingly ample pay-off.
Speaking of conclusions, if you're looking for a solid Halloween special and don't have the patience for shoddy editing and lying to children about where their favorite Rangers are, you best look far, far elsewhere. That said, if you want a kick in the nostalgia center if you haven't watched anything from "Mighty Morphin" in a lonngggggg time, you can't go wrong with Bulk & Skull at their finest... but there are much, much, much better episodes of MMPR out there.
All in all, regardless of the many flaws in the episode, you'll still get pumped by the Megazord transformation sequence.