Which episodes of Fairy Tail are anime-exclusive?
These following episodes list the content which are only present in the anime of Fairy Tail, not in the manga. 
This is a list of episodes defined as anime exclusive in the Fairy Tail Wikia

Compactly, it gives episodes: 19, 69-72, 74-75, 125-150, 204-218, 221, 223-225

Galuna Island Arc


Episode 19 - Challenging!


Daphne Arc


Episode 69 - Call of the Dragon
Episode 70 - Natsu Vs. Gray!!
Episode 71 - Friendship Will Overcome the Dead
Episode 72 - Fairy Tail Wizards
Episode 74 - Wendy's First Big Mission?!
Episode 75 - The 24-Hours Endurance Road Race


Key of the Starry Sky Arc


Episodes 125-150 - This whole arc is anime exclusive


Eclipse Celestial Spirits Arc


Episodes 204-218 - Stake My Life on Hospitality - Believe
Episode 221 - The White Silver Labyrinth
Episode 223 - Kemokemo Arrived!
Episode 224 - The Place You Came Before
Episode 225 - The Thunder Man




The series currently ends with Episode 235