This was an auto loss since I start first. Machop gets the first energy and attacks, which would normally only do 20 damage.
Because most electric cards in Pokémon The Trading Card Game are weak to Fighting type attacks, Joltik here, which in a normal Pokémon game would actually have a 2x defense due to its bug type (and electric not being weak to fighting), actually has weakness, and takes an additional 20 damage.
The Joltik card only has 40 health, and therefore, Joltik dies because it will take 40 damage because of the weakness. I have no more playable Pokémon on my bench (stage 1s and 2s require basic Pokémon to be able to be put in play [evolving]), therefore, it results in a loss instantly.