Question says it all. https://bulbapedia.bulbagarden.net/wiki/Mr._Mime_(Jungle_6)
I’m not sure if this is a good answer, but it would be pretty good. As some of the comments say, many cards now do a lot of damage, so it would be a strong wall. But it has a very low hp so it would be taken down quickly, and the attack that it does have has a base power of 10 which is not good at all. (Not including the damage counter thing, which wouldn’t matter much anyway as it does so little damage)
Hope this helped!