Originally Posted by Fat Zaon
It shouldn't be ban because it is based on luck but because it is uncompetitive. All matchs are based on luck but miss your move because of an evasion move is uncompetitive even if it's rarely happened
This argument is flawed. Let me use your logic. All defense boosting moves help avoid XHKOs. These are therefore uncompetitive since it disallows a pokemon to die which is against our motives. Again, "all matches are based on KOing pokemon but failing to KO because of a defense boost is uncompetitive even though it happens"
Do you know why defense boosting is superior? They are consistent. You can still get hit(no defense boost)/taunted(you are a siiting duck afterwards) even after evasion. Do you know what these evasion/defense boosting pokemon have in common? They can be phazed. And they require certain moveslots. Evasion moveset example: Double Team/Recover/Substitute/Free Moveslot. Defense-boosting moveset example: Calm Mind or Bulk Up/Judgment or Physical Coverage/Recover/ Refresh or Substitute.
Now tell me honestly, which would give you a better chance to win? Which one is more reliable? Why would you want to boost evasion when the opponent can just phaze you with Whirlwind? What is the end result? You gave your opponent free turns and then they still kill you eventually.
You can talk about baton pass. Baton Pass will usually lose to surprise taunts or whirlwinds or roar. I will say that something more dangerous already exists: Shell Smash Smeargle.