These are some modded ships which can active in your tournament mode without mods.
When you restart the game, you need to reload these ships in tournament mode.

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This is a high technology battleship with two big drones.

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This is a heavy fighter which has insane fire power.

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This is just a monster that can destroy almost everything in seconds.

A diagram of these ships.

I can confirm that it works (I didn't need to restart). Fascinating...