Evil Bob is an evil cat who lives on ScapeRune, and he is also the exact opposite of Bob the Jagex Cat. He wears a human speak amulet, which is how players are able to converse with him without the need for a Catspeak amulet.
When sent to Evil Bob's Island, players had to catch cooked fish and uncook them for Evil Bob. A servant would give you hints as to what to do to put Evil Bob to sleep. If the player feeds Evil Bob a fish from the wrong side of the island, he will watch them closer and the player will have to cook more fish to escape.
Successfully completing the fishing event will grant 650 Fishing experience or 650 Magic experience. If the player has an unboosted Magic level of 51+, it's a 50% chance of being Magic XP, otherwise it's Fishing XP. To avoid surprising pures. After the player is teleported to their original position, they are prompted with the message:
"You feel somehow that you've become better at Fishing/Magic."