QI have an Oceanus and a Sham-Nacha, Heir to Entwining on my field, and I evolve the latter, putting its crest into my EX area. When resolving Oceanus's triggered automatic ability, can I choose any number of options instead?

AYes. The crest would already be in your EX area by the time you need to resolve Oceanus's ability.

QIf I have this crest in my EX area, can I use Hamelin's Fanfare ability to put a token of the same name into my EX area?

ANo. Each player can only have 1 copy of a crest with the same name in their EX area.

QWhen choosing multiple options, can I choose what order they are resolved in?

ANo. You must resolve them in the order listed on the card.

QWhen choosing "any number instead," can I choose 0?

ANo. You must choose at least 1 option.

QWhen choosing "any number instead," can I choose the same option more than once?

ANo, you can't.

QCan crests in the EX area be selected by abilities that select cards?

AYes, they can.

QCan crests in the EX area be banished or transformed?

AYes, they can.