Missingno. Master
Poison-type Trainer
Every time they get a Magikarp from the salesman, they get rid of it, claiming that it's worthless. But, in that filler in the Orange Islands, involving all those Magikarp, Team Rocket try to catch them all, because they evolve into Gyarados. Now, why can't they remember this when they encounter the Magikarp Salesman?