Wow, that is a lot of damage. The main problem is he has a lot of inferiority compared to other CB users, like Rhyperior (who also has Ground STAB), Tyranitar, Metagross and Scizor.
However, Donphan has Ice Shard, and the CB set has the element of surprise.
With Assurance. If Donphan is the SR user of the team, he would generally be setting up SR as the ghost swaps in (SR > spinning SR off, as SR can't be blocked, but Spin can), making Assurance's 100 base power appear very unlikely to be used.
However, Donphan has Ice Shard, and the CB set has the element of surprise.
With Assurance. If Donphan is the SR user of the team, he would generally be setting up SR as the ghost swaps in (SR > spinning SR off, as SR can't be blocked, but Spin can), making Assurance's 100 base power appear very unlikely to be used.