From Out Of Nowhere, 1

Here's an exterior shot of the Cimmerian Planet.

Here's a shot of Rita and Zedd at the Evil Gathering on the Cimmerian Planet.

Here's a shot of King Mondo and Queen Machina at the Evil Gathering on the Cimmerian Planet.

Here's a shot of Elgar, Rygog and Master Vile at the Evil Gathering.

Here's a shot of Zedd's Putties, the Blue Globbor with its Aquitar Mode and I believe a Putra Pod.

Here's a shot of Piranhatrons, Divatox and General Havoc at the gathering.

Here's Astronema.

Here's a shot of Astronema and her Quantrons.

Here's a shot of Goldar and Rita at the Evil Gathering.

Dark Specter, the grand monarch of evil is another case of reusing a previous suit which you'll see below.

Previous Suit

This Maligore suit comes from Turbo: A Power Rangers Movie

Dark Specter Suit.

Here's a shot of the captured Zordon.

Here's a shot of Finster, Rygog and Goldar at the gathering.

Here's a shot of the Cloaked Figure with the Spiral Saber.

Here's a shot of the Quantrons.

Here's the Red Space Ranger.

Here's a shot of the Red Galaxy Glider in new footage.

Some footage of the Mega Shuttle could have been new footage but the footage of the Megaship pulling the shuttle in is Sentai footage.
Here's some shots of the interior of the Astro Megaship.

Here's the Astro Megaship's Camera.

Here are some more interior shots of the Astro Megaship.

Here's some Velocifighters.

Here's a shot of the Red Ranger with his Astro Blaster.

Here's a shot of the Red Ranger with his 2 Blasters which he calls "Auto Blaster Dual Mode."

This is obviously new footage.
Most exterior shots of the Megaship is Sentai footage including when the red beam is in the same shot as it.
Here's a shot of Cassie inside the Megaship.

Here's another shot of the interior of the Megaship, this looks to be the elevator of the Megaship.

The shot of the Megaship beginning to fall or crash is new footage.
Here's another interior shot of the Megaship.

All footage of the Sphinx Ship is Sentai however the interior footage of the Sphinx Ship's Cockpit is new.
Here's a shot of the Quantrons in the same shot as the Megaship.