How to beat: spawn a very op managarmr or alpha fire wyvern.

Make sure it kills a giga with one hit.

Make sure it has a lot of stamina.

Managarmr: Ice beam does not damage king titan.

Alpha fire wyvern: needs to be forcetamed.

Spawn with following commands:

Managarmr: SDF icejumper_character 1 69999

Alpha fire wyvern:SDF megawyvern_character 1 69999

I hope this helps

-Ladi Rex