They are the undisputed top trainer in each region, but with eight Pokémon champions across six generations only one is the very best that there ever was.
Wallace is one of two gym leaders turned champion. He is a master of water type Pokémon and the most inferior champion. He is more concerned with making a fashion statement then battling. He isn’t threatening or particularly strong despite being one of the last survivors of the ancient people of Sootopolis. Since his specialty is weak against common attacks (such as electricity and grass), taking him down is one of the easiest battles you will have. Did I mention he only got the job because he was best friends with the former champion? It’s all about who you know in the Pokémon world.