Which Power Rangers season featured the 'Galaxy Megazord'?

The Power Rangers season featuring the Galaxy Megazord was Power Rangers: Lost Galaxy.

Lost Galaxy was the franchise’s seventh television season and premiered in 1999. Its Rangers protected Terra Venture, a space colony searching for a new home, after discovering the mystical Quasar Sabers on the planet Mirinoi. The team eventually befriended five living Galactabeasts, which could transform into Galactazords.

The Galaxy Megazord formed when the five Galactazords combined: the Lion, Condor, Gorilla, Wolf, and Wildcat Galactazords. It was the team’s primary giant robot and used the Galaxy Saber in battle. Later, the Rangers gained an upgraded form called the Orion Galaxy Megazord.

A common mix-up is confusing the Galaxy Megazord with the Astro Megazord from Power Rangers in Space. The Astro Megazord belonged to an earlier team and was connected to the Astro Megaship, while the Galaxy Megazord was created specifically for Lost Galaxy. The season aired 45 episodes from February through December 1999.