Namco Museum: Battle Collection Better upgrades in Galaga Arrangement
Let your ship get stolen, then let another steal your ship. Kill one, get the power-up, then kill the other bug to get an ultra upgrade. Try using different bugs.
Ship select in Galaga Arrangement
Successfully complete the game to unlock ship selection in Free Play mode. This allows you to select a ship upgrade before starting a level.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original