Monsters featured in Power Rangers Ninja Steel

- Abrakadanger [850]#850 - Abrakadanger
- Badpipes [837]#837 - My Friend Redbot
- Basherbots [840, 843–845, 848, 850–853]#840 - Rocking & Rolling, #843 - Family Fusion, #844 - Ace and the Race, #845 - The Royal Rival, #848 - Monkey Business, #850 - Abrakadanger, #851 - Helping Hand, #852 - Galvanax Rises, #853 - Past, Presents, and Future
- Cat O’Clock [849, 853]#849 - The Adventures of Redbot, #853 - Past, Presents, and Future
- Cleocatra [853]#853 - Past, Presents, and Future
- Cosmo Royale [832–852]#832 - Return of the Prism, #833 - Forged in Steel, #834 - Live and Learn, #835 - Presto Change-O, #836 - Drive to Survive, #837 - My Friend Redbot, #838 - Hack Attack, #839 - Gold Rush, #840 - Rocking & Rolling, #841 - The Ranger Ribbon, #842 - Poisonous Plots, #843 - Family Fusion, #844 - Ace and the Race, #845 - The Royal Rival, #846 - The Royal Rumble, #847 - Grave Robber, #848 - Monkey Business, #849 - The Adventures of Redbot, #850 - Abrakadanger, #851 - Helping Hand, #852 - Galvanax Rises
- Cyborg Aiden [841–843]#841 - The Ranger Ribbon, #842 - Poisonous Plots, #843 - Family Fusion
- Drillion [845–846]#845 - The Royal Rival, #846 - The Royal Rumble
- Forcefear [851]#851 - Helping Hand
- Galvanax [832–839, 841–846, 849–853]#832 - Return of the Prism, #833 - Forged in Steel, #834 - Live and Learn, #835 - Presto Change-O, #836 - Drive to Survive, #837 - My Friend Redbot, #838 - Hack Attack, #839 - Gold Rush, #841 - The Ranger Ribbon, #842 - Poisonous Plots, #843 - Family Fusion, #844 - Ace and the Race, #845 - The Royal Rival, #846 - The Royal Rumble, #849 - The Adventures of Redbot, #850 - Abrakadanger, #851 - Helping Hand, #852 - Galvanax Rises, #853 - Past, Presents, and Future
- Hacktrack [838, 847, 853]#838 - Hack Attack, #847 - Grave Robber, #853 - Past, Presents, and Future
- Korvaka [832]#832 - Return of the Prism
- Kudabots [832–850, 853]#832 - Return of the Prism, #833 - Forged in Steel, #834 - Live and Learn, #835 - Presto Change-O, #836 - Drive to Survive, #837 - My Friend Redbot, #838 - Hack Attack, #839 - Gold Rush, #840 - Rocking & Rolling, #841 - The Ranger Ribbon, #842 - Poisonous Plots, #843 - Family Fusion, #844 - Ace and the Race, #845 - The Royal Rival, #846 - The Royal Rumble, #847 - Grave Robber, #848 - Monkey Business, #849 - The Adventures of Redbot, #850 - Abrakadanger, #853 - Past, Presents, and Future
- Lavagor [832]#832 - Return of the Prism
- Madame Odius [832–839, 841–843, 845–846, 850–852]#832 - Return of the Prism, #833 - Forged in Steel, #834 - Live and Learn, #835 - Presto Change-O, #836 - Drive to Survive, #837 - My Friend Redbot, #838 - Hack Attack, #839 - Gold Rush, #841 - The Ranger Ribbon, #842 - Poisonous Plots, #843 - Family Fusion, #845 - The Royal Rival, #846 - The Royal Rumble, #850 - Abrakadanger, #851 - Helping Hand, #852 - Galvanax Rises
- Phonepanzee [848]#848 - Monkey Business
- Ripcon [832–843, 853]#832 - Return of the Prism, #833 - Forged in Steel, #834 - Live and Learn, #835 - Presto Change-O, #836 - Drive to Survive, #837 - My Friend Redbot, #838 - Hack Attack, #839 - Gold Rush, #840 - Rocking & Rolling, #841 - The Ranger Ribbon, #842 - Poisonous Plots, #843 - Family Fusion, #853 - Past, Presents, and Future
- Ripperrat [833]#833 - Forged in Steel
- “Shadow Monster” [839]#839 - Gold Rush
- Shoespike [844]#844 - Ace and the Race
- Skullgators [834, 839, 843, 845, 847]#834 - Live and Learn, #839 - Gold Rush, #843 - Family Fusion, #845 - The Royal Rival, #847 - Grave Robber
- Slogre [835, 847]#835 - Presto Change-O, #847 - Grave Robber
- Spinferno [834, 847]#834 - Live and Learn, #847 - Grave Robber
- Stonedozer [840]#840 - Rocking & Rolling
- Tangleweb [836]#836 - Drive to Survive
- Toxitea [842]#842 - Poisonous Plots
- Trapsaw [841, 847, 849]#841 - The Ranger Ribbon, #847 - Grave Robber, #849 - The Adventures of Redbot
Total: 27 monsters