Monsters (Mighty Morphin Power Rangers → Power Rangers in Space)

Disney's The Chipmunks and Chipettes

 * Commander Crayfish (Zariganimonsuta, "Crayfishmonster") (Leader)
 * Mutant Rangers
 * Mutant Red Ranger
 * Mutant Green Ranger
 * Mutant Black Ranger
 * Mutant Blue Ranger
 * Mutant Yellow Ranger
 * Mutant Pink Ranger
 * Giant
 * Bones
 * Skeleton Warriors
 * Mighty Minotaur
 * King Sphinx/Fly Guy
 * Gnarly Gnome
 * Pudgy Pig
 * Chunky Chicken
 * Eye Guy
 * Knasty Knight
 * Pineoctopus
 * Terror Toad
 * Dark Warrior
 * Spidertron
 * Spit Flower
 * Frankenstein Monster → Mutitus
 * Samurai Fan Man
 * Rockstar
 * Polluticorn
 * Octoplant
 * Goo Fish
 * Fighting Flea
 * Jellyfish Warrior
 * Mantis
 * Dramole
 * Grumble Bee
 * Two-Headed Parrot
 * Pumpkin Rapper (Panpukin Rappaa)
 * Pumpkin-headed (Z-)Putty Patrollers
 * Slippery Shark
 * Soccadillo
 * Rhinoblaster (Raino Burasutaa, "Rhino Blaster")
 * (Z-)Putty Patrollers in Football Jerseys
 * Oysterizer
 * Pirantishead
 * Primator (Purigorira, "Pre-Gorilla")
 * Saliguana
 * Bloom of Doom (Furawaabasutaa, "Flowerbaster")
 * Robogoat
 * Guitardo
 * TurbanShell
 * Pipebrain
 * Trumpet Top
 * Mirror Maniac
 * Nimrod the Scarlet Sentinel, AC & DC
 * Pursehead
 * Lipsyncher
 * Magnet Brain
 * Key Monster
 * Terror Blossom
 * Cannontop
 * Pachinko Head
 * Showbiz Monster
 * Scatterbrain
 * Tube Monster
 * Flame Head
 * Jaws of Destruction
 * Photomare
 * Wizard of Deception
 * Rat Monsters
 * Snow Monster
 * Turkey Jerk
 * Vase Face
 * Needlenose
 * Repellator
 * Artistmole
 * Ravenator
 * Brick Bully
 * Dischordia
 * Witchblade
 * Impursonator
 * Traffic Sign Monster
 * Wolfbane
 * Cog Changer
 * Amphibitor
 * Shadow Chromite
 * The Demon Racers
 * Electrovolt
 * Mad Mike the Pizza Chef
 * Clockster
 * Lord Litter
 * Goldgoyle
 * Electrotramp
 * Clawhammer
 * Power Driller
 * Fearog
 * Horror Bull
 * Lizwizard
 * Datascammer

Season 1

 * Commander Crayfish
 * Mutant Rangers
 * Mutant Godzilla
 * Mutant Mammoth
 * Mutant Tricera
 * Mutant Saber
 * Mutant Ptera
 * Giant
 * Bones
 * Skeleton Warriors
 * Mighty Minotaur
 * King Sphinx/Fly Guy
 * Gnarly Gnome
 * Pudgy Pig
 * Chunky Chicken
 * Eye Guy
 * Knasty Knight
 * Pineoctopus
 * Terror Toad
 * Dark Warrior
 * Spidertron
 * Spit Flower
 * Frankenstein Monster → Mutitus
 * Samurai Fan Man
 * Rockstar
 * Polluticorn
 * Octoplant
 * Goo Fish
 * Fighting Flea
 * Jellyfish Warrior
 * Mantis
 * Dramole
 * Grumble Bee
 * Two-Headed Parrot
 * Pumpkin Rapper
 * Pumpkin-headed (Z-)Putty Patrollers
 * Slippery Shark
 * Soccadillo
 * Rhinoblaster
 * (Z-)Putty Patrollers in Football Jerseys
 * Oysterizer

Season 2

 * Pirantishead
 * Primator
 * Saliguana
 * Bloom of Doom
 * Robogoat
 * Guitardo
 * TurbanShell
 * Pipebrain
 * Trumpet Top
 * Mirror Maniac
 * Nimrod the Scarlet Sentinel, AC & DC
 * Pursehead
 * Lipsyncher
 * Magnet Brain
 * Key Monster
 * Terror Blossom
 * Cannontop
 * Pachinko Head
 * Showbiz Monster
 * Scatterbrain
 * Tube Monster
 * Flame Head
 * Jaws of Destruction
 * Photomare
 * Wizard of Deception
 * Rat Monsters
 * Snow Monster
 * Turkey Jerk
 * Vase Face
 * Needlenose

Season 3

 * Repellator
 * Artistmole
 * Ravenator
 * Brick Bully
 * Dischordia
 * Witchblade
 * Impursonator

Bara Monsters

 * Traffic Sign Monster
 * Wolfbane
 * Cog Changer

Destructi Monsters

 * Amphibitor
 * Shadow Chromite
 * The Demon Racers
 * Electrovolt
 * Mad Mike the Pizza Chef
 * Clockster
 * Lord Litter
 * Goldgoyle

Nejire Monsters

 * Electrotramp
 * Clawhammer
 * Power Driller
 * Fearog
 * Horror Bull
 * Lizwizard
 * Datascammer