Instead of multiple threads about what changes to abilities, moves, and base stats, This thread will be dedicated to changing anything Competitive.

Some basic rules to abide by.
Avoid stuff like:"Allow Excadrill because Smogon doesn't know better"
Make sure Moveset and Ability changes are logical (stuff like Flareon and Fire Punch are a good example of illogical stuff)

Here's a good example to start things off.

Snorlax should have access to Slack Off, through breeding, but not into Munchlax.

Slack Off would provide Snorlax the recovery it needs outside of rest.