On the one hoof, generally speaking accountants should not be summoned from other planes of existence, and I feel that a review of Pinkie Pie's Extraplanar Summoner's license is needed. On the other, you probably should have explained to Anon that while necromancy is quite illegal, the careful contract-binding of extraplanar entities is still legal provided the summoner is licensed and submits the relevant paperwork. I'm proud of you for not assuming the worst of guests simply because of their species or origin, Twilight.