Hmm...just checked the Roll Call topic and you say you've got Fire Red. Pinsir isn't available at all on Fire Red. If you're playing this challenge on Fire Red, you'll have to find someone to trade with who has Leaf Green and trade something to them for a Pinsir...I suppose Crazy might require you to wait until you reach Celadon to do that since a Leaf Green player can't get Pinsir until Celadon. Other, less restrictive challenges require that.