Add new Mega Z abilities coming to Champions

[jemarq04]

Change description

I added new mega abilities being added in an upcoming patch in Pokemon Champions following https://www.serebii.net/pokemonchampions/megaabilities.shtml. This added a brand new one: Aura Guard (Mega Lucario Z). The flavor text for this was taken from Bulbapedia. Also added Levitate to Mega Garchomp Z and Sharpness to Mega Absol Z.

AI coding assistance disclosure

No AI was used.

Contributor check list

• I have written a description of the contribution and explained its motivation.
• I have written tests for my code changes (if applicable).
• I have read and understood the AI Assisted Contribution guidelines.
• I will own this change in production, and I am prepared to fix any bugs caused by my code change.