超時空の大決戦
Lit. "Ultraman Tiga & Ultraman Dyna & Ultraman Gaia: The Great Battle in Hyperspace" or "Ultraman Gaia: The Battle in Hyperspace"

The theatrical movie spin-off to [[Ultraman Gaia (series)|]], released in 1999.

This movie is set in the real world, in which the [[Ultra Series]] is just a TV show.

It is also a crossover between the three Ultramen, [[Ultraman Tiga]], [[Ultraman Dyna]], and [[Ultraman Gaia]], coining the term, "TDG Trilogy" or the "Heisei Ultraman Trilogy".
ultraman tiga ultraman dyna & ultraman gaia: cho jiku no dai kessen