These are the following episodes with Gajeel Redfox x Levy McGarden "moments".

Episode 41-Home

Episode 97-Best Partner

Episode 100-Mest

Episode 101-The Black Wizard

Episode 102-Iron Soul

Episode 120-Daybreak at Tenrou Island

Episode 122-Let's registrarse Hands

Episode 123- X791 Fairy Tail

Episode 125-Magic Dance Ball

Episode 129-Raging Showdown! Natsu vs. Laxus

Episode 133-Traveling Companions

Episode 135-Trail of the Myth

Episode 137-That Which Exceeds Calculations

Episode 138-The Whereabouts of the Crusade

Episode 139-The Moment That's Activated

Episode140-Reborn Oracion Seis Appears!