Thanks to magumi-yashi for suggesting this Mega.

( you know I'm surprised they did not hold an event for jirachi in ORAS I mean it is the mythical pixie for the hoen region)

Jirachi has a balanced 100 of each base stat, but that all changes when it Mega evolves. I decided to do an Omega and an Alpha version of this pokemon.

Jirachi Ω:
Jirachi Omega gets a boost to its offense stats, boosting its attack and sp attack to 150. I would like to keep the ability screen grace on it, but I'm changing it to make it more interesting. Jirachi trades in its psychic type for the ghost type, and it gets the ability cursed body. Its appearance becomes darker and more powerful looking with shadowy strands extending from its body.
Stat boosts:
50 attack
50 sp attack

Jirachi α:
Jirachi α gets a boost to its defense stats, giving it 150 in each defensive stat. It loses the psychic type and gains the fairy type. It also gains the ability magic bounce. It becomes more defensive and gets pink strands intel oping its body, as well as a pink cloak around its body.
Stat boosts:
50 defense
50 sp defense

Hey if you guys want to tell me which one you'd use out of these two, just comment below. Personally I would probably run mixed attacker omega. Tell me what you think!