User blog:Guidorz/Machinegun Talk effect

If I attack with Tyk Tysons, switch it with Curry Potter via Jokers Change amd the result of GR summoning is Machinegun Talk: can I untap the tapped Curry Potter to make Potter attack again? (even if it is summoned via Jokers Change? Does it have summoning sickness or not?)

Thanks to anyone that would answer me :)