Some effect boxes can come kind of close to the sound of something that might sound like a "kind of" talkbox...
there's a new "ya" effect that can be heard on alien love secrets by Steve VAI, and a "gonk" pedal, made by some factory, dunno which one... the ZOOM 3030 has a built in talk box, just plug your microphone, your guitar, and you almost sound like.....errrrrrrr...... some cheap effect that tries to be a talkbox...