How is the contest spectacular determined for a dual type Pokemon?

Question

Say I have a Mega Sceptile in a contest. What determines whether it uses the grass spectacular or dragon spectacular?

Answer 1

Most of the time, it's based on a Pokemon's primary type. Although there is a small chance of it being based on the secondary type.

Comments

What is the exact chance? In percentage I mean.

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Even serebii doesn't have the excat chance.

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oh Ok tanks then! :D