Shrink and grow doesn't do shit. Chopper can shrink and grow too but once he got caught by Peros' candy it was game over.
Yep. The candy can block Luffy's G3 easily.
Vinsmokes, Big Father, Brook and Chopper all are helpless once they got caught by the candy.
Match up matters. Jack is not as fast as sulong minks. Once he got caught it's game over.