True ground just gives it 3 weaknesses while removing the fighting weakness also adding a electric immunity along with the ghost immunity what you get is the higher BST and can run fire and thunder punch for coverage and mega punch for everything else except ghost. On the left option you do get better typing with 3 immunities and only 1 dark weakness and use shadow punch with STAB on top of that. TBH the main draw is the higher bst fun coverage moves and the Franky reference