(For example, one could play Lugia to beat Urshifu but that deck is unfavored against Miraidon, Charizard, and Gardevoir, so its hard to justify bringing it to any major event.) The main threat to the deck is Mew VMAX, which has a decent matchup spread outside of Urshifu
Standard has a lot of countermagic
Bold, Bright, and Shiny Pokmon
You could focus on creatures with enter the battlefield triggers, like Meteor Golem and Kogla, the Titan Ape
Hakbal of the Surging Soul is the second most popular Simic Commander on EDHREC, right behind our #1 pick that is widely known as a menace in the Commander format
In essence, every MDFC is a slightly overcosted spell combined with a slightly underpowered land (thanks to coming into play tapped or costing three life to come into play untapped, in the case of the mythic MDFC cycle, and only tapping for one color of mana)