
Season 3
Overview
After having skirmished with a number of dangerous monsters, Star Butterfly arrives on Earth to live with the Diaz family. However, rather than living a normal life, Star continues on having to battle villains both throughout the universe and in their high school, although if only to protect her extremely powerful wand, an object which she is still confused with.
Episodes

1. Battle for Mewni: Return to Mewni
2017-07-15
Star returns to her home dimension of Mewni where she discovers that magic is disappearing throughout the kingdom.

2. Battle for Mewni: Moon the Undaunted
2017-07-15
Star must dig deep and challenge archnemesis Ludo in an effort to save her family and kingdom.

3. Battle for Mewni: Book Be Gone
2017-07-15
Despite dire warnings, Ludo tries to write a new chapter in the Book of Spells.

4. Battle for Mewni: Marco and the King
2017-07-15
King River struggles to keep the kingdom running without Queen Moon's help.

5. Battle for Mewni: Puddle Defender
2017-07-15
Buffrog helps Star escape from Moon's ever-protective watch.

6. Battle for Mewni: King Ludo
2017-07-15
With Ludo in control of the kingdom, Marco must decide his next move.

7. Battle for Mewni: Toffee
2017-07-15
King Ludo's reign reaches as a tipping point as Star returns to the castle. Star must summon her strength to save her family and the kingdom.

8. Scent of a Hoodie
2017-11-06
Star secretly keeps Marco's hoodie as a reminder of their friendship.

9. Rest in Pudding
2017-11-06
Star has recurring visions of Glossaryck and believes he's haunting her.

10. Club Snubbed
2017-11-07
Tom snubs Star at the Silver Bell Ball.

11. Stranger Danger
2017-11-07
Star meets the ancient Queen Eclipsa.

12. Demoncism
2017-11-08
Star and Tom's relationship is put to the test when Tom decides to get rid of his demons.

13. Sophomore Slump
2017-11-08
Marco decides to put a full effort into living life in the present on Earth.

14. Lint Catcher
2017-11-09
Knight of the wash, Sir Lavabo, gets a familiar squire.

15. Trial by Squire
2017-11-09
Star prepares for the Midnight Warrior Blowout Sale at Quest Buy.

16. Princess Turdina
2017-11-13
A surprise visitor pressures Marco to reveal Turdina's true identity.

17. Starfari
2017-11-13
Star goes out into the field to understand why Mewmans treat Monsters unfairly.

18. Sweet Dreams
2017-11-14
Star discovers she travels through multiple dimensions in her dreams.

19. Lava Lake Beach
2017-11-14
Kelly breaks up with her boyfriend and Marco questions his friendship with Star Butterfly.

20. Death Peck
2017-11-15
Star urges the royal youth of Mewni to sign a petition calling for the equal treatment of monsters.

21. Ponymonium
2017-11-15
Star becomes thrilled when Pony Head invites her to dinner with her sisters.

22. Nightlife
2017-11-16
Star learns that Marco and Hekapoo have been dealing with rogue interdimensional portals.

23. Deep Dive
2017-11-16
Star's sleep-portaling becomes a danger and she decides to put a stop to it.

24. Monster Bash
2017-11-16
All the youth of Mewni gather at the ancient Monster Temple to celebrate a new era of monsters and Mewmans living together in peace -- until guests start disappearing.

25. Stump Day
2017-12-02
Star, Marco and the rest of Mewni celebrate a special snowy holiday, "Stump Day."

26. Holiday Spellcial
2017-12-02
Spider with a Top Hat invites one of Eclipsa’s dark spells to the office holiday party.

27. The Bogbeast of Boggabah
2018-03-03
King River interrupts Star's eager investigation into Eclipsa's past and demands her help on a dangerous hunt.

28. Total Eclipsa the Moon
2018-03-03
Moon enlists Eclipsa herself to access Mewni's most guarded records.

29. Butterfly Trap
2018-03-10
Moon and the Magical High Commission put Eclipsa on trial for her evil past with Star as a key witness.

30. Ludo, Where Art Thou?
2018-03-10
Dennis goes on a dangerous journey to find Ludo living in another dimension.

31. Is Another Mystery
2018-03-17
Buffrog leaves Mewni in search for a better life, and Star goes to look for him.

32. Marco Jr.
2018-03-17
Marco returns to Echo Creek to discover that his mom is pregnant.

33. Skooled!
2018-03-24
Ponyhead returns to St. O’s and finds that the curriculum got tougher.

34. Booth Buddies
2018-03-24
A magical photo booth at a wedding goes on the fritz and captures Star and Marco inside.

35. Bam Ui Pati!
2018-03-31
Ponyhead shuts herself away to watch the finale of her favorite Korean Drama.

36. Tough Love
2018-03-31
Eclipsa and Moon bring Princess Meteora home peacefully after the massive destruction she's caused.

37. Divide
2018-04-07
Star becomes acting Queen and plans for Marco and his warriors to delay Meteora from reaching Castle Butterfly long enough for Star to find Moon and destroy the monster princess.

38. Conquer
2018-04-07
Star must find the courage to face Meteora alone and make a decision that will change the kingdom forever.