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Carrier Zords
From Galaxy of Chaos' Wiki
Carrier Zords (or Shuttlezords) are powerful Zords usually several times larger than aa typical Zord. They are usually crucial components for an Ultrazord combination.
Strictly, only Titanus was ever identified as a Carrier Zord, and Tor as a Shuttlezord, on screen. However, they are other Zords who clearly serve the same purpose, even if on-screen canon does not allow them to have the same name.