From the sounds of things though, I'd probably be back about two hours after hammer. So I'd really just need to make certain when KY would be on so I could face him.
Realistically I should be worse off because I don't have psychic immunity and a x2 damage boost from a type advantage on my attack stats.
It's still winnable, but it comes down to what KY does mostly.
irish already said he's using Umbreon today which is a far inferior version of Mewtwo. And it makes sense for him to have that as his primary since he has all three of his lives still.
And an inability to make effective use of investigations results based on what Pokemon player has on their roster without also being capable of checking multiple pokemon on that roster outside of battles.